Install WeaponInfo.xml to this directory:

EFLC Full Installation Default: C:\Program Files\Rockstar Games\EFLC\TBoGT\common\data
EFLC as DLC Default: C:\Program Files\Rockstar Games\Grand Theft Auto IV\EFLC\TBoGT\common\data

Install explosionFx.dat inside the effects folder* to this directory:

EFLC Full Installation Default: C:\Program Files\Rockstar Games\EFLC\TBoGT\common\data\effects
EFLC as DLC Default: C:\Program Files\Rockstar Games\Grand Theft Auto IV\EFLC\TBoGT\common\data\effects

*= You can copy the effects folder directly to directories below:

EFLC Full Installation Default: C:\Program Files\Rockstar Games\EFLC\TBoGT\common\data
EFLC as DLC Default: C:\Program Files\Rockstar Games\Grand Theft Auto IV\EFLC\TBoGT\common\data
