5 point harness in a car w/o roll cage...How to do it?

Thanks for all your help! Everyone has saved me alot of time, money, and alot of trouble.

I am thinking that I am going to run a set of seats like these...

http://shop.enthusiastworld.com/images/m/904/17869.jpg

Not necessarly those but a set like them...

As far as the belts go probably something like these (once I have the roll cage in and feel comfortable with it...

http://store.summitracing.com/partdetail.asp?autofilter=1&part=RCI%2D9211D&N=700+4294839020+4294920121+4294903731+4294818621+4294789620+4294903742+4294903726+4294789624+4294903749+115&autoview=sku

I have not looked in to the 5 point harnesses yet so... I am still really new to them. Any help or comment is greatly appreciated!