Recency, I SHARE YOUR FRUSTRATION.
I did get some tips on this, but right now my only success was placing the old .gau files with the panel (in panel folder, not all worked)
ThankYou for the advice. I will try that. Someone has indicated that there is no solution but I still think that there is. If some of the FS98 Gauges work or are compatible in FS2004 then they should work in FSX. I think it may be just a matter of changing the dates on the gauges but don't know how to do that as of yet.
FS98 hauges did work in FS9 however they are no longer supported in FSX.
You'd be better off spending your time finding replacements for those FS98 gauges
or designing your own that waste time looking for a soulution where there is none.
Also, be aware that all .gau files are not necessarily FS98 gauges. There are many
.gau files that do work in FSX but the ones that ARE FS98 gauges flat will not work.
Paul