Good point on the camera model! Might indeed be useful.
I guess either just making a construct and making a construct with the intention of flaring would do, so long as whoever took the picture can say which pictures were with or without the intention of flaring, after the research is done of course.
As far as location is concerned, any location will do, and perhaps it would be a good idea to take some pictures in a light environment as well as in a dark environment, possibly discerning between natural and artificial light. If you want to take IR pictures, but don't want to make an IR camera, I guess it might be possible to make an appointment for a specific time, when a construct would be made on a location where I or someone else can make the photo at that specific time.
I'd be happy to send the pictures to you as well, it always helps to have someone else to independently check results.
I'm really eager to see what comes out of this

And aside from that, home science projects are always fun

EDIT: the IR webcam I use is a Trust Invido, model number 26430-02 (though I doubt the model number matters). For the regular pictures, I plan on using the camera on my HTC Desire S.
Also, something that might be significant: I've found out that some IR (or near-IR) light passes through the filter on most digital cameras. An easy way to test this: point a TV remote towards your camera and press a button. If you see a blinking light, your camera is slightly IR-sensitive.
I'm working on a small overview of the experiment, which I will finish and upload in the near future. The link will be posted here. It will contain the outlines of the experiment, including used materials and how to make your cheap webcam into an IR camera.