In the Sprite manager you can "quick import FLC frames"
I tried it with some i found hiding on my C: drive and it works. WHAT PROGRAM MAKES THEM???
WWW.microsoft.com has drawn a blanc and nothing else is being helpfull. You are my last chanse!!!
Calm Down... Lol....
I searched for a flc file making program but couldn't find one.. so heres a custom way of making FLC files
Make an Animated Gif in whatever program you want, there are thousands out there eg.
Macromedia Fireworks, Microsoft Gif Animator ( I Think)
Then I downloaded A program called River Past Video Perspective from http://www.download.com
And that allows you to convert .gifs (and many other formats like .mov and .avi) into .FLC Format....
Hope this Helps :P
RAD Video Tools (http://www.radgametools.com/smkdown.htm) (Smacker) can convert to FLC too.