So I would have to completely reprogram say the Louisiana LWIN system and ignore the stock on? If so I guess I would have to buy a larger SD card? What is the maximum support memory card size?
No. If your only issue is how Systems/Departments/Channels are alpha tagged, it can be dealt with. Create Favorites Lists, importing the desired system(s) from the main database. You can then re-name any alpha tags to what you like.
It is just a matter of taking the time to do so.
You won't "need" to buy a new SD card. Most "power scannists" have gotten larger cards, however. If a lot of audio is recorded, the bigger (up to 32 GB) the better. Also it never hurts to have a spare card or two - there have been several reports of card corruption necessitating replacement.
I have several spare cards, each of which contains a profile specific to what I'm doing. I'll have a "Car - Home" card, and two "Car - Travel" cards.
Given the relative low cost of cards, which you can get most anywhere (Best Buy, Walmart, on-line), it's a good investment to keep you going.