[V6-12v] Headliner falling down... Hints?

[The CyberPoet]

Well, I think I'm armed for the task, with a full set of Bentley  
manuals on the shelf and a big spray can of 3M Type 77 Super Spray  
Affixer (adhesive), but I figured before I tackle the project, I'll  
ask around to see if anyone has insights into tips, tricks or  
pitfalls I'm likely to encounter. The headliner over the backseat has  
finally started to fall down in a few places and I want to deal with  
it before it falls down all over...

'92 Audi 100S, moonroof.

Cheers
=-= Marc