You need these files: GTAIV MOD TOOLS
Common.rpf (make a backup)
Located in \GAMEZ\Game_ID\PS3_GAME\USRDIR
Now open up OpenIV.exe
open Common.rpf
You should now see three folders. click on the data folder and scroll all the way down to weaponinfo.xml.
right click and extract.
Now open IV Needle.exe
and click on weapon editor.
Now click on load and select weaponinfo.xml
click on the scroll down bar for weapon type and select DEAGLE.
we are now going to change the Fire type and the Damage Type.
change fire type to PROJECTILE
and change Damage type to EXPLOSIVE
Now select the Projectile tab
Change Type to Create: to ROCKET
you can save or make different changes.
Go back to OpenIV.exe and open common.rpf, and go back to weaponinfo.xml and right click and replace.
Go back to where you see the three folders and this time select the folder TEXT.
Delete all the languages EXCEPT your own. I will delete all the ones except American.gxt. since my game is in American. apparently not English.
(we delete the unneeded languages because the file cannot be bigger than the original or the game will not work.)
Click on File then click Rebuild and hit yes
Once it is done rebuilding you may now put the common.rpf file back into the game.
Now just start the game and checkout your new mods.

Common.rpf (make a backup)
Located in \GAMEZ\Game_ID\PS3_GAME\USRDIR
Now open up OpenIV.exe
open Common.rpf
You should now see three folders. click on the data folder and scroll all the way down to weaponinfo.xml.
right click and extract.
Now open IV Needle.exe
and click on weapon editor.
Now click on load and select weaponinfo.xml
click on the scroll down bar for weapon type and select DEAGLE.
we are now going to change the Fire type and the Damage Type.
change fire type to PROJECTILE
and change Damage type to EXPLOSIVE
Now select the Projectile tab
Change Type to Create: to ROCKET
you can save or make different changes.
Go back to OpenIV.exe and open common.rpf, and go back to weaponinfo.xml and right click and replace.
Go back to where you see the three folders and this time select the folder TEXT.
Delete all the languages EXCEPT your own. I will delete all the ones except American.gxt. since my game is in American. apparently not English.
(we delete the unneeded languages because the file cannot be bigger than the original or the game will not work.)
Click on File then click Rebuild and hit yes
Once it is done rebuilding you may now put the common.rpf file back into the game.
Now just start the game and checkout your new mods.


