Help using merge tag filter

I currently have an odd pricing structure set up where I needed to conditionally add a product so that it looks as though the user is getting a discount on the second product. I then hid the conditional product with css. I would like to use the nice {all fields} merge tag since there are a lot of products, but I don't want them to see the individual prices or that "invisible" product. I think this is possible using the merge tag filter by using values and id's, but im not a php guy so Im not quite sure how this works. The invisible products are only two id's and im sure price"value" can be stripped in one go.... can anyone help? If it takes a bit id be willing Paypal some money :)