Conditonal display based on items in the cart

[cpp-dev]

When there is a specific item in the cart I want to display a check box form element. So far I can get it to display w/o conditions (but that's the easiest...

[diecastfast]

Every single page on my site has exactly (150) blank lines of code in the Source. I've spent an hour reading related threads to no avail. Any help?...