I've been doing various product shots with a point and shoot for some time, and I have some insight as to this.
First of all, what color is the background going to be? White or black will wreck havoc with a P&S on full auto mode.
If the camera has a manual or custom white balance setting, you will get close enough with 5500k (or so) CFL's. Purist will hold their nose, but I personally think that this will be the least of your worries.
Taken with K20D:
Taken with P&S:
The photos are out of camera jpg's with just cropping, resizing, frame and text added. No fancy post processing.
Personally, I'd explain to them that even if you could contrive the perfect portable studio and lighting set-up, the person holding the camera has to know
something about what they are doing. I think the objective with the given limitations is doomed.