Stereo Fender cab simulator, how to build one?

[LivingDeadPunk]

Hi,

I'm gonna build a Fender cab sim, using General guitar gadget PCB, http://www.generalguitargadgets.com/index.php?option=content&task=view&id=97&Itemid=125

I would like 2 outputs in order to use it with my soundcard intputs.

Do I need to build 2 boards or is it a way to modity the existing one to get 2 outputs?

If I need 2 boards, can I use 1 charge pump with both boards or will I need to use 2 pumps?

With two boards, Can I use dual gang pots?