PPP GSM MODULE AND ETHERNET

Hi,
I would like to implement the following:
a pc (with windows xp) will be connected to RCM5700 via ethernet port.
a PPP link will be also created on RCM5700 using serial port and GPRS module.

The PC will have internet access based on the GPRS ISP.

Can someone help me understanding if the above is possible to implement?
Thanks,
Yossi