'lsmod' only shows modules, that are used.
find /lib/modules/´uname -r´ -name "*" | grep -i buslogic
find /lib/modules/´uname -r´ -name "*" | grep -i vm
But they are not present, just tried on SL54 ( = CentOS 5.4 ).
So I thought : No reason to answer you, when no solution.
But you answered yourself, moved your thread away from "zero reply".
Advice: Do not answer your own post #1. Use the Edit button instead.
P.S. : 'buslogic' is present in later kernels, and may be
you have luck with the upcoming kernel 2.6.18-186.el5,
lots of new modules in that, from later kernels ..