add another (different) image to the product to popup in a window

I would like to be able to add another (different) image to the product info page to popup in a window. The popup window will contain a technical drawing, including dimensions of the product.

The idea is... shopper likes the photograph of the cabinet, now shopper wants to know if cabinet will fit on their wall, so they click the tech hyperlink on the product info page and the technical drawing pops up in a popup window displaying this infromation.

Sounds easy, would be great if it was an option in the admin, but if it is I haven't found it.

I have imagehandler2 installed also, I don't think this can handle it though, at least I cannot see how.

Thanks for any help in this regard.

One workaround using what is buiilt in might be to use the "For more information, please visit this product's webpage." function where you place a url in the product description. One could alter the message wording and link to a gif of the type you are seeking.

You could always custom code this.