If you've got a live network connection in VL, you can install X via the package manager (slapt-get)
first, open your /etc/slapt-get/slapt-getrc file as root
mcedit /etc/slapt-get/slapt-getrc
You'll see lines like
SOURCE=ftp://ftp-osl.osuosl.org/pub/vectorlinux/veclinux-5.8/packages
Make sure you have a line that ends with packages, another one for "extra", another one for "testing" and another one for "patches"
Save the file (press F2) and Exit
execute this command
slapt-get --update
after that completes with no errors, you can execute this
slapt-get --install x11-6.9.0 x11-devel-6.9.0 x11-fonts-cyrillic-6.90 x11-fonts-scale-6.9.0 x11-fonts-misc-6.9.0
That should get you an X install.. After that, you should be able to run x and get at least an xterm
You'll need a window manager, you can install xfce the same way you installed X
use
slapt-get --search <name_of_package>
to search for a particular package
HTH