For god's sake, lubricate the damned rubber seal before trying to
reinstall the wing window frame in the door.  Sheesh.  OK, I'm not the
brightest amateur mechanic, but here's a procedure in case you're
curious.  Some jerk busted out my wing window and riffled through my
glove box.  When he didn't find anything, he busted out my sliding
door window and stole my cordless drill.  Hence replacing the window
seals.  Sorry, no pics, got too frustrated:

http://vanagon.okb-1.org/wiki/index.php?title=Wing_Window_Seal_Installation

Cheers,
Matt