upgrade to sempron 2800+

Yesterday, my machine was a rude pc chips m598lmr, with a k6-ii/500mhz (no comments please). Today I build a new one with a gigabyte k8vm800, to a sempron 2800+ 64-bit (no comments please)  they are economics pcs. How could I reconfigurate my distros (SuSE 9.3 and Slackware 10.1) without a reinstalation? Thanks for any help. a. PS--I know there are SuSE 10 and Slackware 10.2 :)