To find out names go on steam, right click
Half Life 2 EP2 and set launch options.

Type this 
-tools -window 

Particle editor will load now so you can preview
particles and view .vmt names if you want them.
________________________________________________________

gtamike_TSGK

P.S. if you are really stuck PM this guy (he helped me)
http://www.youtube.com/user/Thecorp303