Well well. It happens that i just reformatted my Harddisk due to something undeletable in my recycle bin.
I couldn't format C: at first though. Cause i had 3Gig of data important to my work and none of my other partitions were big enough. So i tried Partition Magic 4.0. To my horror, it couldn't even install.
Then i tried PartitionMagic 5.0. The dreaded program incompatibility window poped up again. I installed it nevertheless and started up the program, did all my changes to the partitions and rebooted. No effect at all was there was no dos available. So i rebooted from my Windows ME CD and started the batch file that was created in the PQMagic directory.
No problems since. Wasted 10minutes of my time though for this diversion.