Here is my scenario:

I have a product that is priced $1.00 to use as a donation. The $1.00 price is hidden. The customer can now enter in a quantity that corresponds to the amount that they would like to donate.

Here is my problem, how can I change the qty number just for that product in the cart from the actual qty that the customer entered to a qty of 1 but still show the orginal final price of the product qty? I have been looking at the shopping_default page and haven't figured out how to modify it. Any ideas?

Thanks! :)