loading all the packages shouldn't matter... star office takes forever to load on every computer that exists
. recompiling the kernel to optimize for the k6 might speed things up a bit, and make sure that the 'sis' driver is specified in the /etc/XF86Config file. also, on a full install, there's probably a lot of processes running that don't need to be going. check the kpm program to see what's running... and if there's anything you don't really need, like gpm, crons, ect.