compresion isos

i have untold legends iso and its compressed as .zip (without compresion its 400mb with compression its 82mb) i wanna put it on my psp but everytime i try to load it (devhook) devhook just freezes and im like ??wtf?? so can yall help me

i have a winrar zip folder thing and the untold legends iso is in it but since its in the rar its so much less mb can i still play it on my psp as 84 mb? cause i try to load the winrar zip thingy with the iso in it and devhook freees PLZ HELP!!!!!!

unzip and compress to cso.

ok with untold legends in the winrar archive thing its 82mb without its 400 mb so wat do ido i dont know how to compress .cso??? like wtf i need more help i dont understand that

google: ISO Compressor?! OMFG BRILLIANT

lmao k thanks for that malaias but im not getting anything