I love DD-WRT! In my home, I run two Linksys routers(WRT600N, and E-3000) as AP's, and a pfsense box as my router. When I originally got my WRT600N, the wireless connection would constantly drop out, and the web interface was supremely slow, I grabbed the latest firmware from Linksys and...
If I understand your question correctly, you only have a monitor connected to your Windows PC, but you want to control both machines from you one set of keyboard/mouse/monitor. Well the only options I can think of:
1. UltraVNC. Setup the server on the Linux machine and then setup the client on...