How to split a large file?

[hydefromt70s]

Ok guys, back to the main thread of this topic ...

In http://fileforums.com/showthread.php?t=96465]this topic I fought with obtaining the best possible compression FC4 game and in the end I managed it

Now here we have a problem. We have a single 12.9GB file size. SFK program split this file into 3 smaller parts so that each of them will fit on one single DVD5's. Splitted files have an extension .part*, so we have the file structure: .arc (uncompressed) -> SREP -> lzma (.bin file) and now after splitting -> .part*


The question is: How to "hook up" all this under the Inno Setup installer, eg Glass Black Box?

Can create a .bat script based on SFK program, which would have the task to join the splitted parts into one whole, and then extract the .bin file by INNO. The only problem is that the splitted files must be in the same folder and eventually everyone will be located on a separate DVD's : / This leads also to the fact that the possibility of launching an external application (eg installation of DX, VCRedist or running .bat script) is possible after unpacking the main files (?): /

Any ideas ??