[REQ] How to make ur own mod thingy

Well, uhh I've been working on a knife to sniper mod and uhh when i go in game, it doesn't work.
What it doesn't do: it doesn't shoot.

Why?

Can someone please post up a tutorial on what to do?

What i did:

RezeXtract it.
Copy & paste the PVMLA_L96A1.LTB to my desktop
Copy & paste the PVMLA_M9.LTB to my desktop
Renamed PVMLA_L96A1.LTB to PVMLA_L96A1X.LTB (for backup)
Renamed PVMLA_M9.LTB to PVMLA_L96A1.LTB ( In the post, ill call it New)
Moved the "New" to the GUNS_M_PV_SR and replaced the old one.

that's what I did.
And uh don't call me choob or flame here please T.T

#### EDIT #####
I'm just asking, mostly, did i do it right?

Its not gonna work. You cant make a knife into a sniper