Just tried the model: this is awesome!
Congratulation, you made the best looking dinosaur model, it beats most dinosaur from games and it's just a replacement.
You should help the jurassic life mod, so we could finaly see this released :F.
Only one thing, could be cool to pack the models/sounds/textures in an addon and instead of replacing the antlionguard, just make a clone of it with your custom model.
I did it with my vortigaunt in hev suit, here is an example of code if you want:
//Adding the npc
local NPC =
Name = "Allosaurus",
Class = "npc_antlionguard",
Model = "models\allosaurus.mdl",
Icon = "materials\VGUI\entities\npc_vorthev",
Category = "Dinosaurs"
list.Set( "NPC", "npc_allosaurus", NPC )
Just copy/paste this code in a lua file that is located in addons\allosaurus\lua\autorun for example and it will add a custom NPC.