I've been having this problem since I tried installing god of war from EP. Most of the guides on the internet keeps saying that you'll need to extract it.
I've extracted the first .rar and got:
.r00 - .r29 in .rar
.r30 - .r65 in .r** file
System Information thingy
.sfv
.iso.rar (Whut?)
I've extracted the .r00 to .r29 and .r00 to .r65 using winrar that gave me a folder with PSP_Game and UMD Data thingy.
So what exactly do I need to do to convert it to .ISO I wanted to try extracting .r00 - .r65 using 7zip but it cant convert multiple files at once i think.