Gaieus,
Thanks ever so much for your thorough reply AGAIN. I really appreciate it, you've made it all very clear and easy to follow. Thanks!
I was out at 9am taking a few photos (where I could!) and where the snow wasn't too bad so have now got the weekend to just have a little play.
Also, just one more question if I may. When modelling buildings, how do you photo texture parts of the building which are totally unaccessible?! Or do you just do the best you can by 'borrowing' parts of the building which you CAN see? I assume this is the way to go but unsure what Google will make of it. AM i right in thinkign that I should avoid using SU's materials at all costs?