3 Quick Zen Cart Tweaks

Hello, I'm looking to finish up my online Zen Cart store and I have pretty much everything dialed in except for 3 things that I can't figure out: 1. I'd like to make the main picture bigger on the product info pages. I see that setting in the admin but it doesn't seem to be working as it should 2. Sometimes when I add products to the shopping cart the thumbnails don't show up. 3. When you click the link to change your shipping or billing address, the headings on the window that pops up are not correct (see [login to view URL] for an example) Looking for someone experienced with ZenCart that can help me with these last things. Thank you.