[maemo-users] Any way to run GPRS and wlan simultaneously?

[From: Mayuresh]

I'd like to use wlan interface to masquerade GPRS connection on local wifi
network.

By default, it seems only one of GPRS and wifi can be active at a time.

Is there any way to keep both of them active simultaneously?
I couldn't find ifup scripts for gprs0 or wlan0.

(I was able to get usb networking work simultaneously with gprs. However
wifi will be preferable.)

Mayuresh