If you are using a script to modify values anyway, turn your calculation field into a data field and just have the script assign a value to it.
You might test your set up to see if an auto-entered value using a calculation might work. There's a check box that, if set keeps the calculation from replacing an existing value so your calc can assign a value when the record is first created, but when you later use a script to modify it, the script can do so without the calculation re-evaluating on you.
I will look into the data field and see what I can figure out. So each project would have several meetings all starting with #1 and minutes starting at #.01. Will the script take into account the project number and go from there accordingly?
How do I turn the calculation field into a data field. There does not seem to be a field type such as that?
Never mind, it just came to me. Duuuuuu!