I doubt your machine has only 640K of RAM (W2K has slightly higher minimum requirements).
Was it VL Light or "Light Live" you installed?
Can you select "TUI" on boot?
I think it was VL6.0 light . It did run the win2000 Ok although also very slow compared to a more recent laptop. I think that the DEll5000 can only take 512 K of RAM total so may be that's the problem. I did try Ubuntu 9.10 but that has to have a GIG of RAM so it went nowhere .. Is there any Distro of a GUI type of Linux that has less demand son a system? I just need it to do email and browsing and may be open office.
Thank for any advice.