The can use the master/subcalendar construction: add a module on the home page (list display?) and add the other (large month) as subcalendar for the module on the home page. Now the home page calendar will display the events from the subcalendar, and the home page mopdule has it's own settings for display.

You can find documentation on the distribution page of events on CodePlex: http://dnnevents.codeplex.com, and there is a pdf with user documentation on the download page: http://dnnevents.codeplex.com/release....

BTW You are working with an old version of DNN as well  as the Events module! Time to upgrade?

The month view is defined by the schedule control i.c.w. CSS (Event theme), this makes it possible to have different colors and sizes. You might want to try to make your own CSS based theme to make it smaller.

The content of a cell in the calendar is defined by a template (Settings, Template, Month View Event Text).

You also might want to try a list view as default and use the repeater list lay-out in combination with the template to define what is going to be displayed.

If nothing helps, you can always use the XML output of a calendar and make up the display completely yourself...