My computer specs are as followed:

Acer Aspire m5620
Acer G33t-AM Mobo
Intel Quad Core Q6600 2.4Ghz
Hitachi 500GB Hard Drive SATA
nVidia 8600GT 256MB
5GB Memory Ram
ICH9R

There is no way i can change the SATA mod on bios, its greyed out so i can't highlight it to change it to AHCI at all.

Tried installing with all distro's out there (iatkos, ideneb, iPC, leo4all and kalyway (10.5.2 worked but combo update didnt work).

Seems like the mian problem is "waitng for root device" after the installation process.

What could be the main problem? Help please?