crashed PC

Are You sure your problem isn't with the HD itself. Pull it back off of the good system and then go to the website for whichever brand of drive you have and download their diagnostic tools. Seagate, Western Digital, and Maxtor all have good downloadable tools that will create a floppy boot disk to test the hard drive with.
If the hard drive checks out OK, then revisit your jumper settings to make absolutely sure that they are correct for the machine that you are installing it on. I'd even goso far as placing it on the secondary IDE controller temporarily to see if it worked. Jumper as master and disconnect the CD or DVD drive on the secondary channel to see if the PC will boot up after I made sure that the HD was good.

Hope this helps.

If you are attempting to boot of the other hard drive, the problem is probably a driver issue. Install the drive as a slave (so that you aren't booting to it) in the working Win2K system. You should then be able to access any data on the other drive. If merely attempting to access data is causing the computer to crash, you have hard drive problems.

here is a test how to tell if your hd is completely lost.. if it goes CLUNK CLUNK...CLUNKpause CLUNK CLUNK.. its trashed.
Never forget the smell test, ive overclocked my pc and burnt a few older p2's up[for fun ahha] anyway. if ur motherboard/processor/HD is dead it usually gives off a foul smell of burning plastic/silicon same goes with PowerSupplies. i would smell everything then i would do diagnostic checks on the HD. If its a Maxtor HD then u have to do a lot o crap to get it to work properly.. i dont' like maxtors... just end up buying a new WD HD best idea