.. in camediamaster (and oly master which is a flavour thereof) there's a 'barrel distortion' tool. Set it (or leave it at) 'Auto' and it undistorts your images for you.
I suppose the version in Studio is the same?
It's also pretty good at putting fisheye effects into images (it's the best I have on my computer thaqt inc. PS7)
That's why I retain camediamaster on my comp just for this BD tool. But it makes the workflow 'a son of a xxxxx'. It's another program, in range of photo editting programs, that I keep on the comp as they do something unique or something far better, and easier, than all the usual suspect editing programs like PS, PSP, etc. For instance, a old cheaper program called Ulead PhotoExpress V2 has a very easy to use setting for printing posters, tiling, and all sorts of stuff like that... I just wish they was all under the same program as then I wouldn't have to be opening/saving tiffs all the time. :-(]