I found your post to be helpful since we just got a scanner over christmas.
Here's what I've been able to make from your list, the old list, and listening:
1 Receiving Poorly
2 Receiving Well
4 Ok
6 Busy
7 Out of Service
8 In Service
20 Location
27 Drivers License Check
29 Warrant Check
42 Home
46 Wrecker
54 Traffic Stop
81 Head Quarters
89 Well Fare Check
Still a work in progress...
Joel