Ok, I got it working now.
In the button properties, I went to upload a new document event and went to the second action (assign value to shared result) and set it like this. Value from screen = Contact.
I figured vendor name in this field would work, but I guess not.
I gotta say, Method Integration is by far the best crm I have found. You are not locked in preconfigured designs by the program. You can make it work how you want or need it to work and the way your business works, but customizing method is a major pain in the butt. LOL