>1. Limit the Number of Dates which can be Selected (via Clicking)
>2. Disallow Selection of a Range of Dates (usually after a Specific Date)

It looks like you need to change the code for this. The rcsDate class (the label with the day) responds to the click, but doesn't have a hook to check if the date should be processed, or not. You would need to modify the class similar to the way the lOnlyDisplayCurrentDays is handled.