figured it out...for my computer anyhow: When you have both archives on your computer, open each and you will see the disc split between the two. When you unpack archive 1, it automatically detects and unpacks #2. Look in the destination folder, the full disc will be there even though you only unpacked part 1. Now if you go back and look at the archive for part one, it will show the whole disc, even though, moments ago, it only had half of it. I've never seen this happen before...i'm using WinXP pro with winRAR 3.6 hope this helps. for future reference, anyone jumping on this should not unpack .rar's until you have both for any disc.