Hi pixnflix,

You know, some time ago I was working on a client's site when I saw that he was using a special extension for VirtueMart that forced a user to select something like installation as one of the checkout steps, I think.

I'm sorry I can't remember what the extension was called, but I'd start off of the VM extensions directory and try to find something on there (assuming you are using VM).

Although you could definitely put up a module on the checkout/cart pages as a strong "reminder" to the users (and use JomGenius to detect whether it is already in the cart or not), this still isn't going to force the users to actually purchase it.

If you want any help to use MetaMod to put up a module based on cart contents I'm happy to help to achieve that, but I really think that if it's important to your workflow, that you should find an extension which makes it part of the workflow.

Hope you can find it,
cheers,
Stephen