First of all, I don't know anyrhing about Vector 4.3. But it seems that there is some descripency with your problem with Slackware 10.0.
Did you managed to install it and boot it? Cause you said you can't get xwindow started AND you said you can't install on nforce 2 boards.
I am sure there is users here who did manage to install and run Slackware 10.0 on nforce 2 boards.
As for xwindow, you need to configure /etc/X11/xorg.conf in order to get Xwindow running correctly. There are a few standard scripts which helps you configure xwindow. I can't remember the commands as I don't use them. I'm sure many of us here can address that.
It would be nice to address the issue instead of jumping to other distro. In the process, we learn new stuff and become more competent Linux user.