A. Installing:
1.Use Notepad to open the /data/weapon.dat of your vc-folder and replace the line of the "Tec9" with this one.
"Tec9              INSTANT_HIT 40.0  250  500  60   45  -1.0  -1.0  -1.0   -1.0	0.45 -0.05	0.11	colt45 	11 15 14  	11 15 12 	99		281 -1 	  280C0	5"
2.Than take an IMG-Editor to open up the gta3.img and delete "tec.dff" and "tec9.txd" ,than add the ones you just downloaded, after thats done REBUILD THE ARCHIVE !!!
3.If you wish to have the original Name of that new Weapon,open up the GXT of viectiy with a GXT-Editor and open the line of the TEC9 ,when it's open replace the Data which should be called "Tec-9" with "Bizon II-SMG"

B. Credits:
The gun was fully made by Silent Viper (webmaster@silentviper.net)
Thanx to Killer.ip of GTAFORUMS.COM for providing me with a tutorial that helped me learning UVMappping
and Thanx for all you,who read this for using my Mod

C.Disclaimer(Don't Mind about damage or not working,if installed right ,nothing will be damaged and everything should work fine):
Even if this Mod was done for a product by Rockstar Games, it ain't supported or made by them,
you use this mod on your own risk, so damages of your PC shouldn't be anyone other's care than your's.
Although that Mod was properly tested and shouldn't damage anything, i can't gurantee that it works on your system same well as on my one, as i don't have
the material to test it on every possible system.