possible server pc, will this work?

[jimbox114]

I had ordered a better motherboard/cpu but long story short I didn't get them and got my money back. Anyways I was able to put a PC together from some old parts that my friend had. Do you think this PC will be able to run a server ok? So far it has:

Amd Duron 850
256 megs pc133 ram (obviously I will be upgradeing the ram if I use it, would add 512megs to it)
2.1 gig hard drive
8 meg video card
windows 2k pro sp4 for the OS.

If I was to upgrade this PC's ram to say 768 megs of ram do you think it will be enough to run a server? Of course the only thing installed on it right now is the OS, and the only things that would be installed is the needed stuff for the Server. The only thing that would concern me is the Hard Drive isn't real fast where it is a older hd. But once it loads up it runs pretty smooth, and its only got the 256 on ram atm.

Also at 768 megs of ram how many zones could be safely booted?