Check the readme file of the download file to see if there are instructions on the wings. If not go into the Fs2002 program and look under assignments and see what is assigned for this. If nothing then you could make an assignment.
As far as the gauges, ther should be a foldetr marked as gauges in the download. Again check the readme file of the download. If nothing, the usual rule of thumb is to move the gauges from the planes file folder to the Fs2002 main gauge folder.
Unless there are special instructions for the weapons, as a rule they are for visual purposes only, unless you are using CSFS 2 or 3.
Hope this helps.