How to reduce the size of psp games (iso's) on the memory stick / compress psp games

( me playing prince of Persia : revelations CSO on my psp with devhook 0.52 )All you guys who play iso's on the memory stick of the psp can now put more games in thanks to iso to cso/dax converter. This converter compresses the iso files hence reducing the size ... for example I can fit in GTA:VCS (with cheat device) , WTF (work time fun) , NFS: 5.10, FIFA STREET :2 ,Burnout: legends , Virtua