designbc,

You probably don't want to put zencart into a sub domain unless you have a specific reason to do so.

Sub domains look like: www.subdomain.domain01.com not like www.domain01.com/subdomain. The second one is what you get if you just create a folder in your domain01.com web space, which is how a lot of people run zencart, but not all.

If both domain01.com and domain02.com are both hosted with iWeb then at least most of the settings will be correct. There's lots of posts and guides on here about moving zencart to a new domain so you should be able to find what you need. Nearly all of the changes you will make will be in the /includes/configure.php and the /admin/includes/configure.php files.

Just make sure you have a copy of everything before you make any changes.