Hacking How to join do1, do2 etc. files ? PS3

[xraven13]

Hi everyone...
Does anyone know what tool should I use to join files with .dox extension successfully ? I tried using HJSplit, and it worked.
But PS3 Splitter doesn't "see" that file at all, so I can't split it anymore. I tried using bunch of different programs, but it didn't work.. Any idea what to do ?

 

[Bloodgod]

7zip or winra

 

[xraven13]

WinRar splits .rar files, and similar... But I don't see that it supports .do files