Fixed IP for pptp client

Hello group

I want to connect a Linux box with pptp version 1.2.0 to a w2k VPN
server.
This works correctly, and the ppp0 is assigned an IP-address by the
VPN server.
Now I want the pptp client to choose its own IP address (out of a
given range - 10.0.0.x ). It is supported by the w2kVPN server for the
client to choose their own IP-address, but how can I tell the pptp
client to do that?

Thanks for any reply

Gr, Hans