Noob Question: Use my Guest VPN on Host System (OSX)

[gegenalles]

Hi,

excuse, if this is a double post, i didn't find it about 1 hour after i posted it first time.

I am looking for a solution to share my VPN running on a virtual box with windows xp.

I have running virtual box on mac osx 10.6 with windows xp as guest system.

My client forced me to use his VPN, I can use this on WINDOWS in a Virtual Box but not natively on OS-X.
Is there a way to share the vpn connection to the guest system?

Thanks a lot.