Customfields in the last page of Virtuemart

[trojan98]

Hello,

first of all, sorry for my English, I'm learning yet.

I'm making a project in Joomla 2.5.7 with Virtuemart 2.0.2 and I have installed the onepagecheckout plugin. I need to show customfields in the last page checkout not in the product details. I got to show the customfield with multiple price in this page, but when I change a value of the "select" the price not update. How I do this?

I would like to show another fields as text input, size, etc

Thanks