Author.. Dr.ShocK 

((ALLWAYS MAKE BACKUPS!!!))

use SparkIV and open (NOT browse) to C:\Program Files\Rockstar Games\EFLC\TLAD\pc\models\cdimages or if your running both GTA IV and EFLC then go to where ever you installed EFLC and import the included files into your weapons_e1.img file save and enjoy 