I had the DNS-DHCP Manager installed on my WinXP machine, but now I am running Win 7 (64bit) and I need to make changes to my DHCP range. I am moving the server behind a firewall which will use internal IPs and no longer be using a public range. I need to configure the DHCP server to serve out the internal IP addresses and stop using my public IP range.

I found the range and DHCP settings in iManager, but don't see a way to change them. I know it's possible using the manager utility, but I can't load it.

So is there a version that works with Win 7 (vista) or what is the best way to accomplish what I need to do?