Here's How to Squeeze all the Spaceout of the Full UMD Version(ISO),
1st Extract all Files using WinRar or UMDGEN 3.0/3.5 or ISOmagic to the desktop, you should have PSP_GAME Folder & UMD_DATA.bin file,
2nd Open PSP_GAME Folder & go in SYSDIR Folder then Open Update Folder,
3rd Delete Contents of UPDATE Folder, not the FOLDER itself!!!!
4th Go backwards to USRDIR Folder, open that & locate the following two files:- pad0.pad & pad1.pad delete these, as these are just wasting space!!!
5th now we need to replace them with Dummy Files, to trick the game into thinking they are still there, here is How to.....
6th Right click on desktop, NOT over an icon, choose New then Text Document, edit the name of the file to yes you guessed it:- pad0.pad
7th Repeat step 6, but rename it:- pad1.pad,
8th replace these two files back where you found the Originals in USRDIR Folder Remember!!!!
9th Good Work, One more thing to do & that requires UMDGEN 3.0/3.5
10th Open this Program up & Drag by left click onto PSP_GAME Folder, keep it pressed & Drag over Program Window, let go of Left Mouse Button & now do the same with UMD_DATA.bin file,
11th good go to the third Icon from the left,(Save the Compilation as ISO),
Click on that & tell the program where you want the ISO Made, (Eg. Desktop).
Wait until it finishes, and there you go, your Ripped down .ISO
I Hope this helps people out there..........Have Fun!!!!!