Is there a way i can add Multiplayer weapons into zombies mode?

If you mean the multiplayer weapons from cod waw sure! All you have to do is look into(not on pc right now) raw/weapons/mp
Copy the weaponfiles you want to your own mod. After you have done that you need to add the weapon(s) to your csv/dlc3/_zombiemode_weapons ect.. ect.. build the mod And that's it.

do you have a good tutorial on this? I am afraid to mess with the CSV file as every time i mess with it i manage to corrupt my map file and break it. If you have a good tutorial i can follow for this i would appreciate it!

Yes I have a good one for you from ZOMB1E-KLLR:
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Alright! So this go's step by step for getting these weapons? Thank you!

No problem 

Another quick question if you can assist me on this but do you know how to re add AI battle chatter for Soldiers?

Another quick question if you can assist me on this but do you know how to re add AI battle chatter for Soldiers?

sound,us_battlechatter,mak,all_sp
sound,ja_battlechatter,mak,all_sp
sound,ru_battlechatter,ber1,all_sp
sound,ge_battlechatter,ber1,all_sp

The scripts for battle chatter are run on all spawned AI. The only thing you have to do is include the sounds in your ".CSV"

sound,us_battlechatter,mak,all_sp
sound,ja_battlechatter,mak,all_sp
sound,ru_battlechatter,ber1,all_sp
sound,ge_battlechatter,ber1,all_sp

NOTE: this will add a lot of sounds to your level so be careful!