got kalyway 10.5.2 installed and running. video, audio network. problem is that i have instability. whenever i try to do something, like click safari, it crashes, and says i have to reboot. no errors, or kernel panic. i tried to upgrade to 10.5.6, and followed steps to do so, and i got the same crash in the middle of the install. now it wont boot up, saying that the appleintelcpupowermangement missing. thoughts as to why the kalyway would keep crashing b4 the upgrade install? thanks in advance

specs as follows:
asus p5n-e SLI
intel 2.4ghz quad
4gb corsair ddr800
160gb SATA maxtor
512mb Nvidia quadro fx1700