How do I do this on this Product Display?
http://www.purtle.com/purtle-brass-camp-2012-registration

Currently the pull-down menu about "Add to cart" shows all the correct Products and prices.
What I want is for all 3 days of the event and the related items to be assigned with a price of $250 total and one t-shirt to be selected for size as part of that.

There would be the full package at $250 and then the individual items that would total more than that.
I think that would be easy with a discount through Rules.

The selection of the multiple items is what is confusing me.
Maybe I should create more fields in the Products and Product display.

I accomplished something with various options on this page.
http://www.purtle.com/content/claude-gordon-mouthpieces-marcinkiewicz-co...
But, it only results in the selection of one product when it is done.

What I am trying to do is select multiple Products to be added to the cart through this one Product Display.

Thanks in advance!