Well I decided I'd make a UMD game loader. From what I understand, its compatibility is pretty much the same as the Genesis UMD Loader. But with 2 major differences.
First of all, it uses a z folder instead of an x folder. Meaning it will not conflict with any existing UMD loaders, or game fixes like the Worms fix.
Also, there is no main interface. When you start the launcher, your game starts, simple as that.
All you have to do is extract the archive to the root of your PSP's memory stick. (The removable disk in my computer.)
I'd like to add it only works on 1.5. And could you please test your own games and post back?
Credits: Kyle2194, Saturn Expedition Committee, and Reborn from PS2NFO.