[Where can I find a mod that adds a "seat" for rovers?]

I've seen pics of people that have driver seats in their rovers and I thought it would be way cool to have one in mine but I can't find a link to it.

[Best computer to run KSP on highest settings?]

I got a AMD fx 4100 quad core with my nvidia gtx 680, 8GB of RAM, and its still not enough to run smoothly with medium settings and a 100 part ship.. :L Such a shame for me because I can't play anymore since I don't want to bare the lag.

Maybe rent out the Blue Gene supercomputer and play ksp on max settings