I have some Sp weapons in my Zm mod how could I work it out is there a video or tut somewhere

I don't understand man can you rephrase it please ?

the singleplayer weapons that are not normal zombie weapons I replaced some of the zombie weapons with them how would they need a upgraded model

Copy the same model for the non upgraded. And rename it to anything. For the camo you have to RMC On the new copied model. And hit edit with notepad. You got to find the "mtl_" files. Them when you do if you already made/have a camo change the "mtl_" to your camo name.