Calendar Groups - exporting Event types to iCal

Hi All,
I deal with multiple calendars and is a bit difficult to stick to the Forecast view alone on the mac.
To be clearer I have two work calendars, one university calendar, two personal calendars and now OF calendar.

Maintaining the spirit of GTD I don’t want to clutter OF with “everything”.

I run multiple folders in OF with projects in them.
Is it possible to make OF share events coming from different folders, to different OF calendars?
For example events of projects in folder 1 add to iCal feed folder 1, and so on.
This way I could focus on different event types directly in iCal.
The forecast view is really useful for short-term planning (1 week to a month) but if I have to plan business meetings and project deadlines I end up using a calendar which is a more complete, dedicated app.