How to make races for custom map & how to run mod th. fo

[mm21456]

I have following question. I am new to midwon madness modding
1.How to make races for custom map & default maps I in detailed tutorail from beginning would be very helpful.
2.how to run mod through folder fo ex. If i have folder name file containing custom cars how to create a shortcut showing like - mod=file or - mod file to user folder system for running mods instead of putting mod in main director for better management of mods