I see you got a AMD Sempron 2600+ on a 754 Socket some of them can do SSE3 some not.
Best kernel to choose seams therefor Voodoo kernel. It's on the iPC distro. Also on XxX_x86_10.5.6_Install_Disc_Universal_Final.v2
(and maybe some others)

But as it looks with your specs it isn't going to be easy. Please find out more about your specs (LAN, audio, also SSE3)