can u partition a raid 0 setup once u have installed XP with say partition magic

NO, Raid must be configured before the OS is installed.

yes you can. you can use the software raid built into xp. Here is the catch. if you have 3 hard drives of equal size or one bigger then install xp on the c drive and ill give you info on the raid later in my post. If you have only 2 drives then you can try this(I'm telling you this as this is what i did.) I had 1 40gb and 1 20gb drive. make the 40 gb your primary master. create a approx 20 gb partition for the c drive and install xp on it. leaving the back 20 and the other 20 unformatted(keep these exact sizes). now after xp is installed create a dynamic partition on the back 20gb of the 40gb drive. when you create the partition it will ask about raid. you can choose raid 0(speed, striping) or 1(redundancy, mirroring). If you have 3 hd's then install xp on you smallest then create the dynamic disk on the 2 other drives(best). Voila.

Hi, ... I recently bought a new custom built tower computer. The parts are an Abit KR7A-Raid motherboard with a Highpoint HPT-372 built in Raid controller, an Athlon 1800+ CPU chip, and 2 Maxtor 40Gig Ultra DMA 133 hard drives in Raid 0 stripe configuration with 1 partition. .... The operating system is Windows XP Home Edition. ... I bought a copy of Windows XP Professional Edition, which I would like to make a clean install on a second NEW partition in the Raid array, while keeping the XP Home on a smaller partition, in DUAL BOOT. .... My question is, can a new second partition be installed in an existing Raid 0 installation, without destroying the current XP Home installation? My software is: Windows XP Professial (Full) Partition Magic Version 7.0 Drive Image Version 5.0 Norton System Works Pro 2002 Thank You, Very Much, TheFOG