[Map] [Fire Red] Difficulty Inserting Maps

[ElectricPenguin]

Heya, I'm pretty new to romhacking and I've only been mapping so far, but I'm having some trouble. I've been trying to insert maps over the original ones, but nearly every time I do it I get an error saying "Invalid pointer to map footer". I looked some stuff up and found how to fix it but I don't have the map I want, so when I insert it again the message comes back. I don't know what to do.
EDIT: Forgot to mention I'm using AdvanceMap 1.92
EDIT 2: I've been making some more maps, and some of them have been inserted. It seems to have to do with the size of the new map relative to the old one; bigger ones don't work. That said, is there still a way I can get bigger maps to insert properly?

 

[Pyxal]

Heya, I'm pretty new to romhacking and I've only been mapping so far, but I'm having some trouble. I've been trying to insert maps over the original ones, but nearly every time I do it I get an error saying "Invalid pointer to map footer". I looked some stuff up and found how to fix it but I don't have the map I want, so when I insert it again the message comes back. I don't know what to do.
EDIT: Forgot to mention I'm using AdvanceMap 1.92
EDIT 2: I've been making some more maps, and some of them have been inserted. It seems to have to do with the size of the new map relative to the old one; bigger ones don't work. That said, is there still a way I can get bigger maps to insert properly?

Concerned.
Why do you want to insert maps, and that is to say, over existing maps?

 

[ElectricPenguin]

I want to create a new region. I don't see a use for the old Kanto maps. Is there a better way to go about this?

 

[Pyxal]

I want to create a new region. I don't see a use for the old Kanto maps. Is there a better way to go about this?

I believe editing existing maps is better. Just change the map connections, make it not look like the Kanto Map, and you are good to go.
Though you can insert new maps in A-Map by clicking the button with a house and arrow at the top, just fill the box (or field) which appears, and you get your map.