Paintballfrog, I can't say whether you have to use UV's or not, but worse case scenario, you just blow the model apart with an atlas map, and bake off your procedural textures. That being said tho...
I get the impression you're not comfortable with UV's?
If that's the case, this might be a good chance for you to dig into that a bit. I haven't opened any of these models and looked, but from the images, none look to be overly poly-intensive, and should work pretty well for practicing UV'ing.
I waited far longer than I should have before [still am really] learning to work with UV's, I just couldn't [un]wrap my head around them. :p [Wow, lame, sorry
]
In retrospect I really wish I'd have learned to UV straight outta the gate; back when I was making simple models with 500 polygons, that way I'd have learned to UV incrementally larger amounts of polygons as my models became more complex, rather than getting to a point where I had to use UV's and needed to unwrap 128,000 polygons, when I didn't really know how to unwrap 10. It left me feeling quite overwhelmed and a little sick at the notion. So I'd encourage you to give UV's a go here.