Intill we get our website up you can check out the latest news, renders and help wanted for the mod Road to Victory here: http://mods.moddb.com/4391/
Renders look rather nice but your concept art looks kind of crappy. Mabey you should remoove th econcept pics before people think your other work is the same standard.
I kinda like the tiger. But I have to agree to you about the other pic.
The tiger is *alright* but its not exactly nice looking. Also, i would not think its particularly useful as when somone comes to model it they are most likely going to use photos and not a low quality pic such as that drawing.
But mea. what to i know about making a mod (not much). Do what you want.