Actually.. there's one more thing I think you'll need to do, which is to modify events_functions.asp - line 11 from:
dNextStart = CDate(intMonthNum <plus symbol> 1 & "/01/" & intYearNum)
to:
dNextStart = CDate("01/" & intMonthNum <plus symbol> 1 & "/" & intYearNum)
This fixes the function which finds the last day of the month
sorry about using "<plus symbol>" instead of the actual symbol, but it appears even enclosed in forum code tags it won't display (bug?).
Cheers
Kim