Wayne,
You can use a UV/IR modified camera perfectly well for terrestrial use.
What you will need to do, however, is correctly white balance in post processing. This is a simple matter of either using a white balance card/disc and making sure you've got a photograph of it in the lighting conditions that you'll be shooting in so you can simply click on the card in post processing and use it to set your white point. With Canon's, you can ensure the card fills your centre spot in the viewfinder, take an image, and set custom white balance (Nikon's require the full frame to be filled with the card), or, lastly, you can just simply click on something which is white (neutral grey) in post processing to set your white balance.
I have found, in general, whilst using expensive white balance cards, gets your colours spot on, it leaves your images looking rather clinical and academic.
For a studio situation, this would be perfect, however, when you're trying to balance multiple light sources of differing types.
H
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