Use another archive program. Try 7zip.

That's probably it. You should be able to work around the problem by extracting the tools to your Blender install directory, assuming that there aren't any UTF characters in that path. You want the scripts to be at Blender\2.69\scripts\addons\io_scene_valvesource\.

That error is normally down to having non-ASCII characters in your Windows username. It's a well-known Blender bug.

It's a bit weird that WinRar doesn't support Bzip2 compression, but Blender does so it's not the problem.

Update to the lastest version of the Tools.

What "doesn't show up"?

Yes, fixed. I've also made sure that VTAs are always imported relative to the object's first shape.

OK, that can be done. It'll be in the next release.

Yeah, restarting should fix whatever this is.

If not, please open the console (Windows > Toggle System Console) and copy what's in there.

I can't change the way that Blender shrinkwraps vertices. You're just going to have to import better data, or import the shapes onto the correct mesh then make modifications to that.

Importer settings aren't stored so you'd have to check the box every time. Not much of an improvement over deleting an object. :)

Thanks for the report, fixed it.