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I have used PM (version 4) to do a partition split on one of my laptops and it worked a treat. The H/D was 48 Gbs and set up with XP Home. While I liked one or two of the XP functions, the use restrictions left me wanting 98 SE. So, I split it 15 Gbs to XP and the rest to 98 and, so far, no problems. In theory, PM4.0 is not compatible with XP but it seemed to be OK on mine - Dell Inspiron.
PM 7.0 was incorporated as a trial version on the 'freebie' CD for PC magazine for Nov 2001. Might be worth trying for a back issue. If all else fails, I have a copy so could, perhaps, get it to you.