Ok well i'm new to the forums so... hey?
Let's begin:
CA with no textures, make a new map somewhere on ur pc then open your combat arms map [nexon>combat arms>game]
You will see like 4 files that begin with TEX, Select them open ca and click start. Now quickly move the TEX files to a map and there you go.
This is useful for people with bad computers. [like me rofl]

Your own music: In your combat arms folder you will see a map called: BMG, open it.
There will be 2 files both are music file [1 for game lobby other for server lobby]
Pick a song you want to replace it with and name it like what it's called in the BMG map and now you can listen to your own music.

Hope you like it and have fun