PPTP Question

Hi,
I am trying to get PPTP clients (Windows XP clients) to connect to some
services on my network.  I setup my PPTP clients to use "192.168.103.1" for
the server, and DHCP starts at "192.168.103.192".  However, I need the
clients to be able to access the 192.168.101.x and 192.168.102.x networks as
well.  When the PPTP client tries to access anything on these subnets the
WinXP client doesn't even send the traffic through the VPN (I'm assuming
because it isn't on the 103 subnet).  Is there any way around this?
 
Thanks,
Jon