Robert, to answer your question as best I can, To mod a DSLR one removes the existing factory fitted filter and replaces it with a UV/IR filter of exactely the same thickness of the original filter, this allows you to keep the Auto Focus functions of the camera.
If this was not the case, you could only focus manually,
The replacement of the original filter with the replacement one will give you at least 20% more sensitivity.
All you images will have a pinkish look to them, which can be processed in software like PS2 or Image Plus, or similar.
Once this removal has been done, it is still possible to use your camera for normal happy snaps, so to speak, but you will have to use custom functions, and shoot a white object in the normal daylight to get this image to use for your custom function.
I modded my own canon 5D, but it was tricky and very risky, but it is now a full frame modded camera
There are some on this site that also do there own, however if you find this daunting, just PM our Eric (Easystyles), he is the man to see and put you right.
I expect that this may not answer all your questions, but it may be a start.
Leon
