Thats what I was afraid the answer would be. It might be a bit of help if Trainz could arrange for the deletion of blocks of baseboards instead of one at a time which would at least make the operation a little faster.
I was hoping that, since Trainz is when it comes down to it, just a computer program, there might have been a way to split the data stored for the routes. (In the same way that a word processor can insert extra blocks of data in the middle of a document). Maybe Auran could give the idea some thought? Still thanks for the answers guys.
regards
Bill