wp e-commerce, theme crafty cart

I have installed and modified the Billion Studios Crafty Cart theme. So far so good in most areas.

http://www.verveportraits.com/shop

WP version 2.8 (new install, never was on 2.7)

Sorry, I am not overly technical. I am new to this so stay with me, I am trying to give as much detail as possible. Please be specific if you are giving me code changes. Php file name, line #, etc. I obviously am green at this.

Questions:
1) On the products page I intended to have a thumbnail of the product and when you click that thumbnail I was hoping it would open to the larger size image or even multiple images. The large size I currently have loaded is 600×400. Instead when you click the thumbnail it just loads forever. I tried installing the Lightbox 2 plug-in and that caused a problem so that when you clicked the products page the top half of the screen was completely black except for the .png nav files. LB2 is currently de-activated.

If you go to the Crafty Cart demo HERE you will see that if you click the t-shirt, lightbox works perfectly and with multiple images.

Same issue with never loading is apparent on instinct shop demo page. Am I the only one seeing this?

2) I cannot find where I can modify the text that appears when a buyer goes to checkout within the e-commerce plug-in files. There are also some fields I want to remove. Any idea which file it is in… there is a lot to look at.

3) After reading all of the plug-in problems with 2.8 is it a better idea to simply install this as 2.7? Might that solve all of my problems? The only added benefit I like in 2.8 is the line #s in the editor. I have DW tho, so I don’t really need them.

Thanks!