um 350 watt power supply?  oOo:  oOo:  oOo:  oOo:  oOo:  oOo: 
computers now adays need at least 400-450 watts to stay stable. i run a 530 watt psu in my machine. other than that it seems llike a good deal. not much of an intel guy but hey a 3ghz p4 is definately rockin. so just swap out that psu with a nice 450 watt or higher and you will be fine. you can find good cheap ones at 
http://www.zipzoomfly.com for under 50 bucks.