Forced insertion “incompatible” module in kernel

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I want insert module with source code missed in newer kernel (for simplicity x.y.z+1 version change). modprobe don't do this. How to change vermagic of module or force insmod or modprobe load module? Modprobe -v say's what it used insmod for insertion, so one program another error. "Incompatible module" or "Exec format error", no matter. I ready for recompiling insmod, reverse-engineer module, or use hex editor to change vermagic and entry points table in module. Please say, how do it more simple?