I forgot I should put this notice up here as well:

I have made a substantial update, with corrections and expansion, of my tutorial on modifying the BoBII terrain. Among other things, it provides information on doing height modifications using high res Space Shuttle Radar Topographical data (SRTM), using all freeware tools. Anyone who has the previous versions will want to update. You can find it here, thanks to the fine folks at airwarfare:
http://airwarfare.com/simnetwork/index.php?name=Downloads&file=details&id=5

Edit: I suspect that link won't work any more, but no matter, check the next post...

It's been a long time coming, but here is a link to the

ALL NEW UPDATED Terrain Tutorial:

http://www3.telus.net/v1ncent/bob/BoB-Terrain-tutorialV2.zip

A fair bit of new material, lots of extra help for the modding neophyte.