Problem solved. Seemed that it WAS this 137 gig barrier that was causing the problems. In all windows OS'es (except XP with SP1), when the OS tries to access the diskspace above that 137gig, whether it is devided into partitions or not (makes no difference), windows crashes.
Solution : install
Intel's Application Accelerator. This utility enables (among others) this 48bit LBA mode.
Use this utility until MS will have the brains to include an update for this in (I hope) SP4 for win2k.
So to anyone who is using win2K and isn't using the application acclerator yet : install it now, because if you'll want to install a new disk (larger than 137gig) into your system in the future and you forget to install IAA then, your system will crash and a completely fresh install will be required to get some life into your PC again.
In my case this wasn't so bad because it was a completely fresh system install to begin with, but if I had installed this disk as a secondary hard drive, it's very well possible that my system would have crashed and destroyed all my data with it.
So be warned!
Note : Intels website makes mention that the IAA utility may not work with Win95, 98 or ME OS'es.