Multiple domains with Apache 2 and win2k

When I read the documentation this all sounded so easy!

I insalled Apache2 on a win 2000 server, which was running visnetic
webserver 3.
I have 3 domains I wish to have on the system each serving it's own content.
All are being routed via DynDNS.org to my 1 home IP address which then
enters a router, and all worked fine on visnetic... (for those wanting to
know why change when it works... PHP5 is not working correctly under
visnetic and I can find no documentation to fix it)

I installed apache and set up domain 1 in that process.
I then tested and it works.
I now move on to VirtualHosts
I can get all listed there but all point to the same initial DocumentRoot
and not thier own!
I can even get them all to point to another root, but can not seem to split
them no matter what I try.

I read somewhere I had to add the original domain to virtual, but when I do
that Apache refuses to restart.

Can anyone help please?