help with multi vendor shipping

[stashandstuff]

I tried to install this contribution, making individual changes as instructed in the install.txt file (rather than copying the files directly).

 

I could not get the shipping module to install at all, so I restored all the files that were changed.

 

With the restore, all of my text definitions disappeared. My admin page now looks like this:

 

And I get this error in my checkout:

Fatal error: Call to undefined method shoppingCart::get_content_type() in /opt/home/cowalunga/htdocs/catalog/includes/classes/order.php on line 136

 

What freaks me out is that I didn't change anything in order.php.