UMDTool allows you to launch UMD\’s on your PSP using various settings. You can launch 2.0+ UMd using MPH Game Loader, RunUMD, or run a UMD at 333Mhz, but this has been Unconfirmed. This is what SodR had said about this apps:

"My original idea was just to create a simple program that could launch MPHGL and RunUMD at 333MHz without any extra trouble.
Then I just added a few extra functions and here we are. These days you don\’t know what program does what, or if you even can boot your new UMD on your 1.0/1.5 psp so I hope this program will make it a little easier to figure that out."

Here\’s a list of features and requirements:

•Launch the UMD
•Launch the UMD @ 333MHz
•Launch the UMD with 2.0+ support (Same method as Flashmod, requires dump of the 2.0 flash in the Memory stick root)      
•Launch MPHGL @ 333MHz (Requires MPH Game Launcher) 
•Launch RunUMD @333MHz (Requires Run UMD)

The 333Mhz support has not been confirmed yet, because the UMD changing the speed back to 222Mhz when the UMD is run. This application only works on PSP version 1.00 and 1.50, but provides a very nice interface for you to launch your UMD\’s from.

Download: [UMDTool v0.1]