found a way to load external apps into freeway ultra:

create a program that loads external apps and give it a caption of FreeDrive

change GPSSoftware= to GPSSoftware=FreeDrive

change FreeDriveEXE= to FreeDriveEXE="path of program"

im still working on building a program to load the external apps but heres a picture of a skin changer ive been working on thats embedded into freeway