WIN2K VPN server using DHCP, ok?!?!

I have a Win2K VPN server on the edge of my network. It is giving the VPN clients IP’s from my DHCP server. I have 2 questions.

1. Is this ok and secure? Using DHCp and not static address?

2. My DHCP server gives out the default gateway as 192.168.0.9, but when VPN users get it, their default gateways are the same as theor IP address. How do I give VPN clients the default gatway in my network?