I installed VectorLinux VL6.0. I chose the resolution of 1024x768 despite higher resolutions are possible.
I did not try to split my screen, but it is how my initial installation is showing up.
My video card is Matrox PCI 32MB MGA G450 Millennium with driver mga.
When I am entering the login at <Welcome to VectorLinux>, there is the same splitting of the screen:
The upper 85% part is dark blue including the line <VectorLinux 2008>. The 15% bottom part is light blue.