There is a guide in the "General" forum.

Please note that I had an issue with the importer and 7.3, the only fix for me was to install 7.2, import, then upgrade to 7.3...

I'm hoping Rick got around to updating the importer for the permission matrix in 7.3 since my issues...

I am a Web Development Contractor, I do not work for UBBCentral. I have provided free User to User Support since the beginning of these support forums.
Do you need Forum Install or Upgrade Services?
Forums: A Gardeners Forum
UBB.threads: UBBWiki, UBB Styles, UBB.Sitemaps
Longtime Supporter & Resident Post-A-Holic
VNC Web Services: Code Modifications, Upgrades, Styling, Coding Services, Disaster Recovery, and more!