What I want is a page like:

x prod1 attr1 attr2 ... price1
x prod2 attr2 attr2 ... price2
...
x prodn attrn attrn ... pricen

'add to cart'
(x stands for check box)
user can select multiple check boxes, hit 'add to cart' once.

I think Chad is right that custom form is the way to go for this page, please let me know if otherwise.

In addition, I'd like user NOT to see 'add to cart' button, if he browses the individual product. Essentially, force user only to use this page to purchase these products.