Hi there

I have searched many sites and many forums but I never found anything related to remove the limit of how many favorites I can add to a map, or by changing the mapsetting file to add more or with a modified navcore.

Anyone have managed to circumvent this problem?

Create a POI file yourself, I did that years ago to store my addresses in it, but you can also store the necessary information yourself in it.
The biggest advantage is that the file is compatible with all further new maps, as an icon, visible on the screen, I added a picture pin.
Here is an example ftp://Twenty_Four_Hour_Service:[email protected]:47474/TomTom%20Adressess%20as%20POI.rar