So everyone is clamoring for the ability to set MP3 ringtones. Let us start by saying, “Not gonna happen” (well at least not this way). Here’s the original info that was floating around the net (Don’t bother trying, it doesn’t work):

Hello everyone! My name is Melissa Trepan, and as well as working for Random House Canada, I am a software technician for Research In Motion (RIM), makers of the Blackberry family. Being in the handheld device “industry”, I’m very interested in my field of work, and after visiting New York City last week, I’m very interested by the T-Mobile Sidekick 3. I understand that many of you have complaints about MP3 files for the player. sonicBOOM, not being ‘transferable’ into the ring tone application on your Sidekick 3. Working with Blackberry’s latest 8700 series, I’ve been trained to have a feel for the whole MP3 file transfer, as it was implemented on our newest devices.
Well, enough of the long intro! Let’s get started!
What you’ll need to begin:
Your T-Mobile Sidekick 3 (fully charged, ready to go)
A working USB cable designed for the Sidekick 3.
An hour or more to get this done.
Unlike the Blackberry 7290/8700/07), after inspecting the OS COD. files, it’s got what we call at RIM, a “ventilation” file, which is blocking the transfer of mp3 files from your sonicBOOM/MiniSD, to the actual hardware of the Sidekick 3 - keep in mind, that all of your MP3s aren’t actually “ON” your Sidekick, they’re just temporarily there, and housed by your SD card.
The “ventilation” file is known as VENDOR.XML , and is (almost) encrypted into the device - this is something that Danger obviously does not understand, because the VENDOR.XML is on the Sidekick 2/Hiptop 2 as well. Throughout the rest of this tutorial, I will refer to that file as Vendor.
The Vendor file is completely pointless (other than blocking out certain options). This file HAS to be deleted in order to transfer files to your Sidekick 3. If you have a blackberry, you may know what I’m talking about. Often on blackberries, the system will crash to a “JVM” error, most commonly errors 102, 103, 507 and 544. To fix this on a blackberry, the Vendor file must be removed as well.
Lets get deleting! Now, you’re going to need a device that is specifically designed for Blackberry devices, Blackberry JDE Component Package v4.1.0 by Research In Motion. This is also known as Javaloader. This is not designed for the Sidekick, but it will work. This can be downloaded at http://www.blackberry.com/developers/downloads/jde/index.shtml , click the first option, Blackberry Java Development Environment v4.1 .
Once downloaded, you will be prompted to install the software to your computer.
Now, the satisfying part - lets delete Vendor! If you chose to run JDE upon finishing the download, close it now. Click the following on a Windows operated PC:
Start>All Programs>Research In Motion>Blackberry JDE Component Package v4.1.0>JDE Components Commands Prompt.
You’ve just opened the Command Prompt, kind of like a DOS Prompt that some of you may be familiar with. For those of you that are a little intimidated by it’s look and feel, don’t worry, this is simple. What we’re going to do now is tell the prompter that we want to delete all ventilation files (there’s only one, Vendor). We’re going to do this by simply typing in the following:
Javaloader -usb wipe
This is going to wipe the ventilation file on your device clean, i.e., no more Vendor.
Press enter.
You’ll notice the Sidekick 3 and computer communicating. Don’t worry, you’ve done everything right so far.
Now, we’re going to need to download the Blackberry Desktop Manager, which is also compatible with most handheld devices. We can get this through the T-Mobile SE site, http://software.se.t-mobile.com/ . Scroll down until you see “8700g”, and download the Desktop Manager version 4.1.1.12. You will be redirected to www.T-Mobileapps.com where you will be prompted to download.
Once downloaded, close and restart. Now, click Options>Connection settings>select USB>Connect.
Once connected, minimize.
You’re almost done! Now you’re going to transfer your MP3 files to your Sidekick 3. We downloaded 3 files from a file share program called BearShare (this is not required, it’s used to download music etc). Save the selected MP3 files to My Documents. Make sure that they are MP3 files.
Now, back to Blackberry Desktop Manager. Click on Application loader. You should get a message saying that no additional software was found. This means that you need to scan manually for your files. Go to Add. From My Documents, select the MP3 files you wish to transfer. Click next, and voila! When we tested this, we tried to transfer 40 MP3 files to the Sidekick, and only 32 transferred due to space restrictions. You may want to delete some of your default Sidekick 3 ringers to make space, if you need it.
Disconnect your Sidekick 3 from the USB cable.
The selected files should appear in your Ring tone library in a name format like the files we transferred, which appeared as “SKI_Jealousy_Paris_Hilton”, which is “Jealousy” by Paris Hilton. After setting this as your phone’s ringer, you’re DONE!
This process takes a while, but once completed once, it should take you only a few seconds to transfer additional files.
Now there’s something you don’t learn at Danger High! Good luck! Happy transferring!

And here’s the word from appletech as posted on the hiptop.com forums:

Just a little note to yall that the recently posted MP3/Ringtone “hack” thing is nothing more than an elaborate prank by a troller to get your hopes up and waste time.

There’s absolutely no way the trick will load an mp3 on the device. The procedure won’t even work on a blackberry. The vendor.XML file is a PC-side file not a device side. There’s nothing we can find at all with respect to the term “ventilation” and a blackberry, and that javaloader cmd will indeed wipe a blackberry device but the tool won’t talk to an Sidekick at all.

The good news you won’t brick your device trying to do so. We’ll keep banging away at the app to make sure though because if you do manage to screw up your device with this “hack”, Tmobile won’t replace your device and you’ll be out a few hundred dollars.

But its a good way to make someone kill 3 hours trying

Does this randomhouse person really work for RIM? I doubt it. Looks more like a recently banned user, kickside2, who attempted to start a bashappletech website. His/her blogger profile ID even was “RIM!”, the company randomhouse claims to work for. Coincidence? I think not.

And why would a RIM software tech work for a book publishing company (Random house Publishing) anyway?

So again folks, don’t waste your time. Nothing good, or bad, will come from this little prank…only a few hours of wasted time.

This entry was posted on Wednesday, July 12th, 2006 at 5:41 pm and is filed under Danger, Features, Rumors, Sidekick III, TMobile. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.