If the Weapons show up okay in the latest weps editor in weapondata.ini then they are installed OKAY
Next to check would be to see you have the correct models and skins in the weapons folder - which you should have anyway
err as an example
[CenterlineStation]
SystemType=WEAPON_STATION
StationID=7
StationGroupID=5
StationType=EXTERNAL
AttachmentPosition= 0.0,-0.37,-1.06
AttachmentAngles=0.0,-2.0,0.0
LoadLimit=1000.0 <---- is this to small for you store? increase it
AllowedWeaponClass=BOMB,FT,EP <------EP signifies it can take an ECM pod like ALQ-119 etc
AttachmentType=NATO,USAF <------is this correct?
ModelNodeName=pylon_centerline
PylonMass=86.18
PylonDragArea=0.02
FuelTankName=Tank300_F16 <---------this has to be the correct name for the fuel tank to show in loadout screen
There may be other params that specify max length of the store etc
Also no SOVIET stores can be loaded on the above even if you put WP/SOVIET attachment types because they are ENEMY nations