It can be if you have a commercial license. VRS does rent such licenses for lower costs to developers but if you don't want to rent, nor buy a commercial license (at rather high price) you have to use the Academic version of P3D.
@Zamirk TACPACK is aircraft agnostic. You can do just about any aircraft with it depending on the weapon availability.
Here is a list of supported weapons:
Laser Guided Bombs (LGBs):
GPS Guided Bombs:
MK-82FE (daisy cutter, fuze extenders)
RocketPodPseudoSingle (For holding rockets that don't actually get loaded into real pods. Like HVARs)
FPU-11 (Super Hornet drop tank, 480 US gallon)
FPU-1A (F-14 drop tank)
F86_Tank (F-86 drop tank)
FPU-610G (F-15 drop tank, 610 US gallon)
RP522 (Mirage 2000 drop tank, 343 gallon)
RP541 (Mirage 2000 drop tank, 528 gallon)
MAC-370 (F-4 drop tank, 370 gallon)
MAC-600 (F-4 drop tank, 600 gallon)
AA42R (Aerial refueling "buddy" store)
ASQ-228 (ATFLIR pod)
For guns and rockets, the following rounds are available:
303-British (Vickers, Lewis)
You can find their SDK here: http://forums.vrsimulations.com/support ... acPack_SDK
They do work on adding more weapons but there are some special conditions for those. Best go over to the VRS support forums for this.