Simple question for old style shopping cart

[mamma_multitasker]

Ok, this is a real lame question I know, but how do I edit the main page in the older style cart. I beleive I have change from a newer version to a older version...in the previos version you just edited the main page through,"define main page." I don't see that and have been searching the file up and down. Thank you in advance http://www.buttonsdiapers.com/