custom quantity dropdown box values

[jtb1]

Hello,

I am working on a shopping cart for a client that would like to have their products ordered in quantities of 1, 2, 3, 6, and 12. I know in the product-->Display Options, that one can change the start and end values, as well as the step for the dropdown box values. Is there any way that I can create custom values? What file would I have to edit to change the option values to 1, 2, 3, 6, and 12? It seems like it can be done, since it is a form item. Any help would be appreciated.

Take care,

Justin