I would say yes but haven't tried...
Devices such as iPaqs come with IR transmitters and usually software called Nevo, at this point all you need is the Nikon remote to 'learn' from or the discrete code off the net. I had a quick look and found ones for th D70/D50 but it's all taken from the ML-L3 transmitter
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So you need:-
A device that transmits the IR code
Any old freeby software on it that will send the code
The code itself either learnt from the Nikon remote or the discrete code off the net