How to set up a download for different formats?

I'm using the latest update (and I am very new to ZC, but a semi-competent general programmer (FoxPro, Access, assembler, etc.) I haven't included a site link as the cart is still incomplete. I have a version sort of set up onsite, but I working on my local computer to make it work first.

I'm trying to set up a download for an individual song or an entire album. But I need to offer the download in both WAV and MP3 formats. I can create a checkbox attribute with the options MP3 or WAV, but there is only one product download slot ion the attribute page. I also offer the album products as a download OR shipped CD (at a different price.) it seems to me that I need to create a separate page for each file (filexx.mp3, filexx.wav, shippedcdorder.no_download). As the price is different, I don't see a way to avoid a second page for the non-DL product, but...

How can I (or even CAN I) select the proper file to download as a result of the customer selecting the MP3 or WAV dropdown?

Thanks for the help.

That is covered in the demo products install and you can see it HERE

PM me if you might wish to see the attribute setup from the admin side

kobra:

That is covered in the demo products install and you can see it HERE

PM me if you might wish to see the attribute setup from the admin sideThanks, that's very helpful. It's one part of the equation, and I will want to talk to you about the attributes. But I also need the price to change, not just shipping. CDs are more expensive than downloads, but it would be wonderful if I could have the product only display on one product page, but all price and format differences selected from one dropdown:

CD - $15.00+S/H
Download WAV $10.00
Download MP3 $10.00