Another place to look for info on kitbashing Plasticville buildings is the Plasticville Collectors Association. They send out a quarterly newsletter which usually has at least one article on the subject. Their website has all the previous issues available for download (PDF files). Dues are quite reasonable at $8 a year for the electronic membership (newsletters are downloaded by you, not mailed to you)
Look here:
http://www.plasticvilleusa.org/
Hope this helps,
J White