1- Dowload UMD Dumper HERE (It works for SLIM )
2- Get the folder called UMDDuper and put to your PSP Folder name GAME150
3- In your PSP open UMDDuper
4- Put your UMD inside the PSP
5- It should sow up a picuture of the game in a box in the LEFT side of the UMD DUMPER
6- Go and put Rename Target File " Change for something DIFERRENT that it is in the box "
7- Than go to Normal Speed (222Mhz) and click X
8- Go to "Start Dumping"

Now just wait! If you don't have the sapece you need it will show up a box saying so!