Custom Sprites?

How would you go about making a custom sprite for your ground texture, or using a model like COD4?
Don’t link me to the wiki or interlopers or any other thing - I google’d for hours and reread the wiki and interlopers many times. I’m still confused. Could someone tell me how I could use a model on the ground, called the detail sprite. Any help is greatly appreciated.

Just think - COD4 sprites, the one that is spammed on the Ghillie mission.

I’ve been wondering this too.

I know how to blend textures, but I don’t know how to attach a sprite to it.

Custom detail sprites? Anyone? Help here, please.