IndianCheese has stumbled upon a very interesting find: a way to use the PSP's Game Sharing ability to launch games such as Namco Battle Museum using just one UMD. Utilising Ahman's latest iR Shell version, he made a couple of steps and was able to play a game without the UMD inside his PSP. Here's what he did:

1. Fire up a 1.50 PSP (Cause you need to use Ahman's iR Shell for this).
2. Load your handheld with a UMD supporting Game Sharing and an UPLOAD.DAT file inside (you'll find out later why). He tried using the Namco Battle Museum.
3. Run iR Shell (link below) and access the following directories:

* Open the UMD Folder (press Square twice to get to ms0:/ and then press Cross on "..", then go into disc0:/)
* Inside of the UMD folder, go into /PSP_GAME
* Find the /USRDIR folder and open it
* Inside, choose DAT folder
* Copy UPLOAD.DAT to your memory stick (L+Square, then Select to copy the file. Navigate to ms0:/ and press L+Select to Paste the file to the root of your memory stick.)

5. Rename the pasted file (UPLOAD.DAT) to UPLOAD.BIN (L+Select, then Rename)
6. Once the file is renamed, select it in iR Shell and press X to run it.
7. If everything was done correctly, the game should start minus the UMD.

This is quite a great find, especially when one of you doesn't have the UMD with them. All you have to do is follow the said process and take the game home with you, without having to borrow the UMD copy itself (removing the age-old "Give me back my game, we're not friends anymore" scenario).

this is really cool ive never used game sharing with my psp

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