Tricky routing/vpn question

[Kurt Granroth]

Here's a puzzle:

Say you need to get an X session using XDMCP over a VPN.  However, that 
VPN only has Windows client.  You are using Exceed and that works but 
you would prefer to use Linux (or OS X) with a "real" X setup.  But see 
above: the VPN *requires* Windows to run.

So you investigate the "Internet Connection Sharing" that comes with 
Win98SE thinking that you could just do a 'route add -net' pointing to 
the Windows computer.. but it doesn't work that way since the ICS works 
using DHCP and you like your Linux box's current IP address just fine, 
thank you very much.

But with that, you are somewhat stuck!

Or at least, *I* am stuck.  Can anybody think of a way that I can do 
some sort of redirection or port forwarding on my Windows box that 
would allow me to access the VPN from Linux?

Kurt