How to use maxquantity field

Hi,

I'm new to web development and I'm trying to build a cart. Romancart has been great so far and I've kinda been using the examples and screencasts to build it.

I'm unclear about certain things and wanted to see if anyone could clarify.

I'm trying to send a custom field, "maxquantity", to the Romancart basket. How do I do this?

I tried the following line of code within the <form> tag but doesn't seem to do anything. It is now displaying the value in the "basket".
<input type="hidden" name="maxquantity" value="10">

How can I add "maxquantity" as a column? Should I add an additional list item in the "shopping cart basket" template?

Thank you very much for your help.