Hello Mac,
Altiris does not make any schema changes to Active Directory. It does provide a free tool to import certain active directory objects (computers, users, sites\subnets), however it is all one way - into Altiris. The full connector solution, which is not free, allows for additional imports and even exports, but does not modify the schema.
If you want documented documentation, the knowledge base and documentation pages should be of great help.
Cheers,
Jim