Hi,
I just thought I'd mention that the next TP release ( no word on when that'll be ) will have an section in the preferences which will let you choose a Project file to use for loading settings from when TG2 starts up or you create a new project. This means that you can set up TG2 how you like it, with extra cameras, a base surface map, cloud layers, whatever, save a Project file and then choose to use that for default settings. This is a much friendlier way of doing things than messing with the default.xml file.
TG Mac v0.9 has a similar feature using World files, if you're a TG Mac user.
Regards,
Jo