Add Customers Via Admin mod -- errors

I have tried to install this Add Customers Via Admin and I keep getting MySQL errors regarding zen_admin_files and add_customers. Obviously there is something I am missing so my question is

1. What am I missing

2. Should I start with version 1.0 and work my way up to the upgraded version of 1.0.2

3. or am I on my own since it's a 'third-party app'.

I have searched but came up blank and if there is a duplicate of this post I apologize already but would love some type of guidance. I already had to delete my cart, thank god I backed up my database prior to making the changes.

Thanks a bunch

Gordy

PS
I am using Zen 1.3.8

Look in the contributions area of this site for a support thread probably by the mod author