Modding tga files?

I'm looking for suitable freeware (hopefully) that can view and edit tga files. Does anyone know of any?

Or does it have to be a Photoshop or equivalent?

Gimp

Great, thanks ER. Oh, and I didn't take it personally. ;)

Ok, now here's the next question - How on earth do you know where to draw the land bridge between England and France when the map_features.tga looks more like the night sky? Heh

Edit: That Gimp program's really neat. Far easier to use than Photoshop.

Edit 2: I take it I need to find the actual cursor values of the place I want to add the bridge. Is there an easy way, e.g. shell command, to find cursor values?

Ignore last question. I have found out how to do this using the map_regions.tga file.