My 2000 Crown Vic has footwell lighting, and I'm interested in adding this in my 07 GT.

I was wondering if anyone has already done this mod, and could provide a link to a write-up.

 

Do a search for LED's, there is a good thread about putting them in for low cost, easy interior lighting... think it was part of an Ambient lighting thread.

 

odiaz put together a great write up on this how to:
http://forums.bradbarnett.net/showthread.php?t=64997
He (and I) used side marker lights but you can use LEDs just the same. If you go down to post #14 I've got a night time shot of before/after. Really brightens up the interior!