Missing models for some special weapons

[Predysipe]

I'm trying to create a small little number of weapons using Worshipper's Realistic CSS Weapons base, and I've properly arranged the lua, models, sound scripts, sounds, and materials for them (not too hard considering these were FPSBanana skins - Yes, yes, it's only a test, not an actual release, per se), yet I get an error in Garry's Mod that goes along the lines of, "Error Vertex file <name of the directory for the weapon it's based on>, should be checksum <negative number> instead of <negative number> " when I pull it out, or spawn it's world model.
I need some help on this, it's got me pretty stumped.

EDIT: Some examples to help clarify my problem:

SWEP.ViewModel = "models/weapons/v_rif_sr3m.mdl"
SWEP.WorldModel = "models/weapons/w_rif_sr3m.mdl"
SWEP.IronSightsPos = Vector(-5.15,-3,2.37)
SWEP.IronSightsAng = Vector(-.4,0,0)

And I go to my models/weapons folder, and the files there are:

v_rif_sr3m.dx80.vtx
v_rif_sr3m.dx90.vtx
v_rif_sr3m.mdl
v_rif_sr3m.vvd
v_rif_sr3m.sw.vtx
v_rif_sr3m.xbox.vtx
w_rif_sr3m.dx80.vtx
w_rif_sr3m.dx90.vtx
w_rif_sr3m.mdl
w_rif_sr3m.vvd
w_rif_sr3m.phy
w_rif_sr3m.sw.vtx

Along with some others that are for the other weapons, properly named, with the directory for them correct.

[Predysipe]

Bump, because it's been nine hours without any reply.

[Entoros]

That sounds like a broken model to me -- I would go ask the guys over in the Modelling forum.

[DocDoomsday]

[QUOTE=Entoros;22478787]That sounds like a broken model to me -- I would go ask the guys over in the Modelling forum.[/QUOTE]

Offtopic: Trololololololol trololololololo...nice new avatar Entoros.

Ontopic: Did OP hex the models?

[Entoros]

Heh, thanks. I cannot stop listening to that man.

Question to the OP: where did you get the models?

[Predysipe]

[QUOTE=Entoros;22479038]
Question to the OP: where did you get the models?[/QUOTE]

I got them off of FPSBanana skins.

[QUOTE=DocDoomsday;22478946]
Ontopic: Did OP hex the models?[/QUOTE]

Ah, no; I actually took the models straight from the sources - Didn't know I'd have to, but I guess that makes sense, considering the models aren't originally from CSS or anything.

Which raises a question in it's own: How -do- I hex a model?

EDIT: Never mind, I figured it out. Thanks for hinting me on what I did wrong, though. Cheers!