adding a file extension

hi guys.

just like to say that the documentaion here on installation and maintanance is great, very easy to read and use.

i have been using gallery for a while and was curious about 1 thing. and that is how do i add another file extension to the list of recognised uploadable files.

i use the .blend file extension a lot and was wondering if it is easy to add to the list along with .mov .avi .rm etc... so that it shows up as a movie file (i will change the logo for the movie to incorperate this)

i suspect its a easy modification as no thumbnails need to be generated so there are no smarts required in it.

can anyone lead to me to correct php file to change this

thanks heaps for you time.

BTW i am using 1.4.2

Alltaken :D :D