Need a little more info - you currently have two drives and are changing one of them to a larger drive ??
If so, why not just keep all your drives and relegate the old, small one as a slave. Your board should accept four drives from the IDE slots - 3 HDs, 1 CD-ROM, unless you have something else like a CDR as well.
Anyway, the easiest way to do this is to use msbackup to compress your current drive into one file and then restore it on your new drive.
If you could keep the current small drive, you could simply copy the info to the new one with a click of the mouse.
BUT... and it's a big but....
If you are replacing your main C: drive with a new master drive, there is no easy way to copy the contents over, unless you just want to save documents etc.
Your applications will not simply copy over, as (I assume you're using win95/98) the registry entries won't be copied with them. Basically, you'll have to re-install any programs.
If you could give us a little more info ??..
Cheers