Need help converting old Applescript for Snow Leopard

Question

Ok, so I've downloaded the app "PowerHour" for mac. It needs to use the date function which is different in Snow Leopard, so I've heard. I don't program in Apple Script so I can't figure out what syntax to use. Can anyone help me fix this code below?
I'm trying to code this because I don't think the original developer has any hand in this program anymore.
The app on macupdate: http://www.macupdate.com/app/mac/24107/power-hour
Here's the part that is giving the errors:
set gameLengthAsDate to (date (zeroTime)) + (enteredMinutes * minutes)
set songLengthAsDate to date (songLength)
set gameStart to current date
set songStart to gameStart
set gameEnd to gameStart + (time of gameLengthAsDate)
set songEnd to songStart + (time of songLengthAsDate)

Answer 1

AppleScript in Snow Leopard is a bit pickier about specifying dates. From the AppleScript Release Notes, "the [date] string must exactly match one of the system date formats".
It looks like the script is using a shortcut to set the time of the current date. I didn't test a modified application (just that the script statements set a valid date), but you might give the following a try:
1) change the following properties (declared at the beginning of the script)property zeroTime : 0
property songLength : 60
2) change the statements that set the time toset gameLengthAsDate to (current date)
set time of gameLengthAsDate to zeroTime + (enteredMinutes * minutes)
set songLengthAsDate to (current date)
set time of songLengthAsDate to songLength