Replacing complete soft top
 

Well, my new soft top roof is arriving today after my old one was cut open by scumbags, can anyone point me in right direction for a guide on how to replace roof on my 99 Boxster?

That project would have made a real nice vandalism insurance claim with installation, etc. Why are you doing it yourself?

From what I gather the right procedure is to do someone else's (not mine!) first. THEN do your own so it will come out right. Don't take this job lightly. Fabric has a strange nature.

I'll be interested in your success. Mine will need replacement soon as well.

Wayne's write up:
Pelican Technical Article: Boxster Convertible New Top - 986 / 987

From his book of course:
Pelican Parts.com - 101 Projects for Your Porsche Boxster

This one also looks pretty comprehensive:
http://images.wikia.com/boxster/images/e/eb/DIY_Boxster_Conv_Top_Canvas_R_R.pdf

And there also are Maurice's series on replacing and maintaining tops at here