AWVR GEs fixed

OK, everyone. I think I finally got rid of the stupid texture errors for the GE units.

Also, I changed a few small things in the config files so that now there's only one version of each engine, rather than two as before (one for 2006, the other for 2009/2010).

If you were having problems with the GEs, you can download them again.

Sorry for the mess, but sometimes Trainz can be a pain...

- Dan (Leadfoot866)