Adding Custom Missions to the All Missions Menu
From STModWiki
Making the mission available from the All Missions menu:
- If you followed the previous instructions for enabling the 'All Missions' menu, you created a file called LegacyMissions.xml in the GameInstall\Campaign\Legacy directory. Open this file and observe that each mission is indicated by a tag inside of the ShellSettings (root) node. To add your mission, add a new node to the root that references the proper .sol file for your mission. The name of the your new node should be unique from any other existing node. Save your changes.
