Guidance on COD 4 Promod Creation

Hello I’m very new to modding, I really want to learn on how to make a custom mod for promod with my own music, menu images, player models etc. However I searched everywhere for tutorials to start off and learn from there but there seems to be lack of resources for my specific situation or maybe I’m not looking in the right place:(

Can someone help me and shed some light on the topic or like provide some guidance or a tutorial on what to do and what to follow ! I know this is rather a big request but I really hope someone can help me out !!!

Thanks in advance !!!

Download cod4 modtools for makemod