Can someone remind me where/how to apply the league and conference logos? Can it be applied in the team.xml?

Done - thanks!

The actual conference logos go into the logos/conferences folder. Naming of the files is controlled through the Teams.xml file, the following are example lines.

<LeagueFormat Format="NFL" Era="2002-Present" Logo="nfl.png">
<Conference ID="1" Name="National" Abbreviation="NFC" Logo="national.png">