how do I uncompress cso's and use them on a moded 3.0 m33-5 slim

soullessone21 · 02-19-2008, 12:25 AM

just like the title I need help new with the psps but I did get it moded now I'm stuck wanna know how to make cso's back into isos and wanna know how to play them

ctighe · 02-19-2008, 01:09 AM

you dont need to switch your cso's into iso's. a cso is a compressed iso so it takes up less space on your memory stick

soullessone21 · 02-19-2008, 01:35 AM

so how do I play cso's then or can someone get me a link to a program I can use with 3.0

canadianbacon · 02-19-2008, 01:37 AM

There is no 3.0M33-5 fw.

Put the .cso in the .ISO folder.

EazyE · 02-19-2008, 02:03 AM

i've noticed the cso's reduce quality and cause the game to chunk. use PSP ISO Compressor v1.4 by danny kay for your compression/decompression needs for larger, faster action games. (racing, gta, etc)

soullessone21 · 02-19-2008, 08:44 PM

well with the compression issue outa the way how do I use iso and cso's from my memory stick and sorry I'm useing 3.80 M33-5 slim

ctighe · 02-19-2008, 08:48 PM

put the iso or cso file into the ISO folder on the root of your memory stick

soullessone21 · 02-20-2008, 03:04 AM

put them in my iso folder and guess what a whole lotta nothing happend haha

NuMB3Rs · 02-20-2008, 02:50 PM

2 things:

go into recovery mode and change the UMD drivers (i use the Sony Driver, but theres a m33 driver too)

or it could be a bad CSO. the only ISO/CSO's i tested and used are:
-medal of honors heroes (does support multiplayer)
-sonic rivals
-coded arms
-prince of persia

these all ran on 3.80 m33-5 with the sony driver

Kreationz · 05-25-2008, 06:07 PM

First, If you didn't make they file (If you did you'd know what CSO is.), you likely downloaded it. That's PIRACY!!

Now that the rant is over. CSO is nothing more than a Compressed iSO. Rename the *.cso to *.iso and put it in the ISO folder on the root of the disk (*.cso won't show up in the XMB, but ISOs will)