cool edit pro limitations

Cool Edit pro on Sathya was supposed to route out each track to one of the outputs on the 8-out Darla card, and I was supposed to mix down using the Tascam TM-D4000 mixer. But CEP 1 was not up to the task - I thought it was due to the tracks being too long, 90 minutes each. Even restricting to just 4 tracks did not help. Thought Audition might be good - but it was not supported on Win98. CEP 2 was able to open the tracks, but while playing, gets MMSYSTEM errors if I put 4 long tracks. The fact that they are on a network drive adds to the mess. So, tried cutting up into 15 minute pieces. Even those pieces, even when copied to local drive, were too big for CEP2. So have currently suspended work on this. Will probably try mixing down in Studio using the Nuendo/Yamaha AW4416 combo, maybe in the summer or something.