Help for Ungueltig Error in FS2002 Panels Imported to FS2004

I found several FS2002 planes that I imported into FS2004 had the dreaded Sound-File Ungueltig error. I commented out the gauges in the panel one by one until I found the offending gauge. I then used a hex editor to view the gauge file. Search for wav. Once you find the wav file, or files,that are required you can then search for the missing wav file and add it, if you have it in FS2002. Just copy the wav file from the FS2002 Sounds folder and put the copy into the FS2004 Sounds folder and Voila! The error is gone. Most of the errors are from the HGHB gauges. If you don't have the wav file you can do a google search for HGHB and download the gauge and the wav files needed. I hope this helps others. Regards, Bob.