The Fraghouse team has come out with a newer version of their mod for Invasion.

I'm downloading it at the moment, all 136.5 MB of it. It is a very large file because it contains a slew of maps built for it. If you're interested, you can get it here.
(Note that the file name contains the words "with patch". This means that you do not need the 6.8 MB patch listed directly below.)

If anyone has already tried this latest version of the mod, please comment on it in this thread.
I must admit that I preferred v.2 of this mod over v.3, so I'm hoping that the new version will be better than the last. I'll be back with my impressions in a few days.

*Edit* My first impressions were so bad that I haven't looked at it again. Thumbs down for now.