You should see 3 folders.

Gauges
sound
Panel.tg626

1. Copy the contents of Gauges to FS9's Gauges folder
(usually, C:\Program Files\Microsoft Games\Flight Simulator 9\Gauges)

2. Copy the contents of sound to FS9's sound folder
(usually, C:\Program Files\Microsoft Games\Flight Simulator 9\sound)

3. Lastly, copy panel.tg626 to your Aerosim DC10 directory.  Mine is
C:\Program Files\Microsoft Games\Flight Simulator 9\Aircraft\AS_DC10_30_CL2

4. IMPORTANT - MAKE A BACKUP COPY OF "aircraft.cfg" just in case!!  Now, 
edit aircraft.cfg so that the "panel=" line of the plane you want to try this on reads

panel=tg626

Now start FS9 and load THAT PLANE - that plane (as in the DC10 with the skin whose entry you edited)
will be the ONLY one that will show the new panel.

If you like it, you can go back and delete the tg616 so the line again reads...

panel=

and then rename your ...

panel 

folder ...

panel.old 

and rename the new panel from ...

panel.tg626 

to just ...

panel


Have fun, don't blame me, blah blah blah, go with god, don't play pool with
anyone named after a city, if rash devlops discontinue use.

Be good.  If you can't be good be careful.  If you can't be careful consider naming it after me.

