thanx Wiz... I was a bit pressed for time so I had to leave out some of the niceties.

igohigh... there are some other advantages. I find "hacking" a pp2 much easier, it's a simpler file so there are fewer places that I can screw it up :-)

Also using our door again as an example, Although it's smart propped into place it can still be moved independently on the XYZ axis (i.e. if you want to "blow the hatch" or rip a door off it's hinges it's much easier to do)