Help please - Leopard on MSI Ex630x

Hello, i am having some trouble installing leopard... it geets to Darwin boot, i press enter, HFS files are starting to load.. it shows up 4 HFS loading messages,then "\" spinning and then it writes something and restarts the PC.. I cant get anywhere past this point, i tried various dists - iAtkos, Kalyway, iDeneb,Leo4All... All of these rebooted at this point.
System Specs -
AMD Athlon Turion 64 x2 (SSE2 / SSE3 )
2 GB RAM
320GB HDD, unformatted,totally free
Geforce 9300GS 256 MB
Any help would be really, really appreciated. Thanks.