Off Topic mpeg1 help

From: ATM Dude (nospam_erik_before5_at_peregrin.net)
Date: 01/18/05 

Date: Mon, 17 Jan 2005 22:10:20 -0800

I have a 20 gig mpeg1 file I need to break up into manageable peices.
I've looked up the file formats for mpeg1 files, but they don't seem to
help much.

Does anybody know where to look for the complete file format? How can I
break this file up in to smaller bits and still have it work?

Thanks for any help in this (to me) odd ball crap.

Erik