Mass Effect 2
If you copy the weapon/armor info from the BIOWeapon.ini file in the DLC folder into the right header of your Coalesced.ini file then run the .ini fixer, it should use those stats instead of the ones in the DLC file. I did this with the Locust from the Kasumi DLC so I could get it before doing her loyalty mission and I wound up with two Locust options in the loadout screen, but since the Firepower pack weapons are automatically added to your inventory, it should just use the new stats. I haven't tried it myself yet as the weapons seem balanced enough as is.
Edit - if you need help with what values to change go to the ME2 wikia - masseffect.wikia.com/wiki/PC_Tweaks_%28Mass_Effect_2%29#BIOGame . This should answer most of your questions.
[Edited by darkus37, 9/11/2010 11:16:59 PM]
what i use for modding is ME2 coalesced compiler, i just make my changes to the individual files in its config folder save em, and compile them with the compiler, i just wish the coalesced compiler was update to have the DLC with it... so anyways if you could clear this up for me that would be great man.