I found this whole concept on the NASIOC forums. A couple of links to downloadable templates for paper car building. It looks like stupid fun and there are some REALLY great looking, very detailed ones there. I think I am gonna give it a go and redecorate my office with some lightweight toys, heh. Unfortunately, the VX models are VERY weak, but it is still a MUST DO. There are some Subaru WRX ones that are insanely great looking though. Just download the template, printout, and start cutting and glueing.
Enjoy.
http://genius.x0.com/pmdirectory/index.html
http://art66.hp.infoseek.co.jp/