I'd suggest something like the following presuming that they are all conventional frequencies and I'm drilling down JFK only:
"F0 Favorites List" with FLQK of 0 and FL Number Tag of 0.
This way all of the frequencies associated with "something" (like JFK) are in the same Department (or Group). They would have a Department Quick Key that you can remember (if you don't want this specific setup) AND the Channel Number Tag for the first channel in the Department is the same as the Department Quick Key. (Having these the same is easier on the memory.
This way if you want to get to JFK channels, you would press Channel>Period(.)>Period(.)>2>Channel to get to the first channel for that department. You can then scroll to get to the other channels in that department. To scan just the channels in that department, Press DEPT to hold on the Department and press Channel to release the Channel Hold and resume scanning (just the department).
Yeah, this sounds confusing, but I think if you give it a shot and work with it for a little bit, you'll get used to it.
"F0 Favorites List" with FLQK of 0 and FL Number Tag of 0.
"S0 All Systems" with System QK of 0 and System Number Tag of 0
"D1 Home" with Dept Quick Key of 1
Channel 1 - Police channel 1 with Channel Number Tag 1
Other channels. . . (no number tags for these)
"D2 JFK" with Dept Quick Key of 2
Channel 1 - Regional center with Channel Number Tag 2
Other channels such as Approach Control, Tower, Ground, Departure, clearance delivery etc. with no number tags for these.
"D3 Military Aviation" with Department Quick Key of 3
Channel 1 - Tower with Channel Number Tag of 3
Other channels, with no number tags
"D4 Air Shows" with Department Quick Key of 4
Channel 1 - Air Boxx with Channel Number Tag of 4
This way if you want to get to JFK channels, you would press Channel>Period(.)>Period(.)>2>Channel to get to the first channel for that department. You can then scroll to get to the other channels in that department. To scan just the channels in that department, Press DEPT to hold on the Department and press Channel to release the Channel Hold and resume scanning (just the department).
Yeah, this sounds confusing, but I think if you give it a shot and work with it for a little bit, you'll get used to it.