How to resize the system partition?

[Guest WetBehindEars]

Is it safe to use PartionMagic on a Windows Server 2003 box? I have a client

who's system partitioin is just about full and I'd rather resize the

partition instead of purchasing 3 new SCSI drives and installing them

(RAID-5). I have moved everything I can possibly move from the system

partition, so my options are PartitionMagic (if its feasable) or order them 3

new larger drives and rebuild it. Could I take out one of the old drives and

put the newer larger drive in and let that rebuild itself? Then do that with

the other 2 new lager drives? What is the best way to go when having to

replace a RAID-5 drive setup?