Thanks Ales. Here is the link to my Normandy buildings on cmmods:
I'd recommend downloading them from there because they are all in one piece. I had to split them up when I uploaded to the repository, and that led to problems like you mentioned. If you want to try again with the 2 parts you got from the repository, make sure both parts are in the same directory, and just extract from part 1. It should automatically extract the rest from part 2, no need to open the 2nd part. I hope that helps.