Hi Rossyuk - Better late than never
I didn't use PDF's what I had was either some old buildings in balsa or I made some carcases from foam board, and then printed sheets of wood texture I got from the internet. CG Textures is a good start but there is a lot of stuff out there.
Measure, cut, ink edges, and paste inside and out. Then the same thing with doors and windows, either pasting them over the wood texture or in some cases I had windows already cut out of the building with frames in, so left those in place or used embroidery plastic grating to create the central pieces of the window.
The bigger problem was I wanted to get a 3d effect so cut up coffee stirrers or latterly fire lighting spills to create the frames around the doors and windows, these were difficult to paint in situ because I couldn't mess up the printed wood texture, and I wanted a fairly rough painted finish on the wood work.
I also used coffee stirrers to edge all the bit's of the false front and sidewalks then tried to match the texture finish with my paint work.
Finally the better roofs are warbases card shingles painted by me - badly, the other roofs with the light shingles are textures I had on the buildings, from 25 years ago. I thought that they would do but the more I look at them the more inclined I am to replace them. I don't think printed roofs work because you can see more easily that there are no graduations in the shingle textures and the printing doesn't overcome that enough.
All I was trying to do was utilise old stuff that otherwise I would have thrown out and do a quick job so I could start gaming with something halfway decent. As it turned out I believe I would have been quicker to go down the coffee stirrer route and paint them. My problem is that I'm not good painting buildings and I didn't want them all grey and weathered which is what I usually end up with.
You could try World Works Games - they used to do some nice western pdf's although I'm not totally sure if they are in business or not. I got some brick buildings from them a couple of months back but apparently their site is up and down like a brides nighty.
Hope that helps - oh the other thing is signs and posters - they make a world of difference. If you look at the Tail Feather Saloon and then search out a game I posted on this board "Big Iron" to see it before postering and you will see what I mean.