I made it!
I have again amultiple boot lilo. One into my VL6 working box, the others
into VL7 and Slackware-13.1 resepectively.
Installed kernel-188.8.131.52 into my VL6 box.
Did lilo with hd setting.
Changed in fstab hd to sd.
Rebooted with VL7CD.
Changed lilo.conf with hd settings to new one with sd settings I copied from VL7.
Rebooted and there I am in my VL6 box all set to sd.
I must admit during the run my heartbeat accelerated a bit.
Now one problem, NVIDIA does not load. I copied /usr/src from VL7
to my box. According to nvidia log the gcc should be 4.4 version.
The compiler used to compile the kernel (gcc 4.4) does not exactly match the
current compiler (gcc 4.2). The Linux 2.6 kernel module loader rejects kern
el modules built with a version of gcc that does not exactly match that of t
he compiler used to build the running kernel.
If you know what you are doing and want to ignore the gcc version check, sel
ect "No" to continue installation. Otherwise, select "Yes" to abort install
ation, set the CC environment variable to the name of the compiler used to c
ompile your kernel, and restart installation.