I was wondering how you compress isos/csos after ripping. I have a few isos that i would like to make a little smaller and i have downloaded the program "UMDgen." On the explorer tab it shows all of the files that the iso contains, does it matter if i delete the "PSP Game --> Sys Dir--> Update " Folder or could I just delete the "Sys Dir" folder all together? Another question i have is how can i remove unnecessary videos/cut scenes and music? Any help at all will be greatly appreciated.