I am trying to upgrade a now non-working 1.2.6 site to 1.3.8a for someone. They ran into problems because the host upgraded SQL last week.

There is only 1 item sold in the store, and he uses Authorize.net

With the complexities involved in the upgrade from 1.2.6 - 1.3.8a, I have been thinking about just a new installation.

Questions:

1. Can I utiilize the old database with a new install?

2. Will it be difficult to set up Authorize.net again?

3. For an upgrade (if I do it), where do I install to? In the 1.2.6 directory, over the existing files?? Then run zc_install?

The files and database are backed up already.

Thanks