Ability to use another calendar via iNotes

Some of my users have a need to use a calendar other then their own. A group calendar. This works fine when they are in the client however we would like to push them to use iNotes since they move around a lot. What the desktop support teams have done is offered Roaming to them to manage this. I would like to end this pratice of using Roaming since the increase in space on the server and the overhead is just not worth my effort.

Is there a way to allow users to use a group calendar over iNotes? I know the technote says not but there has to be something available.

Thanks in advanced.