well u got a few options
- upgrade ur bios , if update is available , but really risky process
- use Disk Manager or powermax in maxtors case , to install Disk Drive Overlay , which makes large capacity hdd run on old systems . i have an 80gb seagate running on a P1-133

p1 i use is mostly for dumps , movies and mp3 and is the secondary system .
- y go in for a 250 GB hdd on an old system if its the primary system ??? rather u could upgrade ur system and then maybe get a 250 gb , and get an 80 or 120 for ur p3 . How much is a 250 gb anyways ??? . else go in for 2 80 gb ,or a 120 gb and a dvd writer will be helpful if u upgrade to new system in the future too .
- r original SD RAMs still available with warranty ? , how much ?