Technical question regarding VPN and 2 routers, need some help.

Hello everyone.

This is the plan:
I own 2 routers, a buffalo (dd-wrt) and my old linksys 54GL (flashed with tomato now, but that could be changed with ddwrt). My plan is to get a Raspberry Pi for online replay or live Euro channels plugged on the linksys. I want to cut cable as I really watch very little TV, but still need access to some Euro channels from time to time. I need to know if it is possible to have only one router with VPN and not the other one. I tried VPN only once and it was cool but was a pain to switch back and forth when visiting local US websites (Hulu, netflix, etc), pain for another someone who is not technically savvy I would say who need a simple setup for play and go, R. Pi permanently connected to the TV.

Any links or suggestions would be greatly appreciated. Thank you.