Absolutely! Remember the Description is a pure HTML field that is rendered for each repository item. So anything you can do in HTML you can do either in the template, or in the description field itself.

- any javascript that would be used by 'all' the repository items should go in the header.html or footer.html template file for the repository skin you are using.

- any javascript that would be used by a single repository item only would go in the description field for the item

So, to do what you want to do, place some css style formatting in your header.html file to format your tabs, then in your description field you would place the proper markups to render the 3 different tabs. The PayPal button again is simply HTML with the proper querystring parameters.

Anyways, that's the approach. If you need an example, let me know and I'll try and put something together for you. Of course, right now it would require some HTML, CSS knowledge to upload an item. When User Defined Fields are supported in DRM3 you will be able to easiliy put together a skin that has the three tabs with 3 user defined fields, one on each tab and uploading a new item will have 3 text boxes for you to easily enter your text...you can do it now with some effort, but you will be able to do it easily in a short while.