Custom fields if custom fields

[musqsim]

Hi there folks!

I´m trying to implement a solution for this:

I'have a product with several sizes, Small, Medium, Large and Giant.

And for each one of those I've severeal "add-ons" tha cost different prices based on the size...

Is possible to create child products for Size and custom plugin like

http://extensions.joomla.org/extensions/extension-specific/virtuemart-extensions/virtuemart-products-display/23008

to diferent size?

ha main ideia is in Front End:

Code Select Expand

Product -> Custom Fields ->

if product id = x {

show custom field for size x

} else if product id = y {

show custom field for size y

} else if custom field for size z{

show custom field for size z

}

Wich files and how I have to edit to implement this?

Thanks in advance!

Joomla 2.5.9
Virtuemart 2.0.8
running on LocalMachine