John, you seem like the real filemaker pro! I am currently using filemaker 5, and I'm wondering if it is worth spending cash to upgrade to 6? Does filemaker 6 increase functionality/intergrative ability with CC Calendar? Might be a stupid question...just learning the software.

If you're actually using "5" as opposed to 5.5, you should upgrade. (A list of reasons can be found here: Differences between 5 and 6.

If you're using 5.5 just make sure you have the latest patch. There isn't a difference using CC Calendar on 5.5 and 6, though in my opinion it is a bit friendlier to modify CC Clandar in 6 (format painter and customer dialog boxes are big time savers).

HTH.