Both these problems can be corrected in
PoseRay. To change the size of the brick pattern, select the 'Materials' and 'UV' tabs, then enter the desired scaling factors into the 'Scale(U, V)' textboxes. If you leave the 'Remap Method' set to 'None', it'll just scale the existing coordinates.
As for it being warped, that's because the coordinates don't make sense for the building geometry. Again, you can re-map coordinates in PoseRay. To do it properly, though, you may have to regroup the wall polys - you'll need a real modeling program for that.
I have a version of the model that I've reworkd. (Cyphyr had one too, that he made for dhavalmistry. It's in circulation - it may work for you.) If you want I could send it to you.