first steps to create a mod

i want to make my one mod with tweaker settings.
how does tweaker works?
if i make a change at tyre positions for example in "tweaker RT-edit" tweaker patch the "gp4.exe" and create a "gp4tweak.bin".
i think in the "gp4tweak.bin" tweaker save the settings and the "gp4.exe" must be patch that the "gp4.exe" works with settings from the "gp4tweak.bin"??? right???
at the CSM i have to uncheck "clean exe check" for working with this "dirty" exe.
i have create a mod of my gp4 folder with all settings.
it work.
but how does it work with a clean "gp4.exe" like all this released mods.
what have i to do??
what settings have i to make in "swap.ini" or "patch.ini"??
can somebody give a simple how-to or a link for a simple explanation??
so long
diam0ndcrush3r