Managed to add some instruments, Need to be placed better.
Add to the file containing the instruments in the models folder, called dhc8-300q.xml
Description will be in How to add instruments, but here is a basic listing from the file:
http://wiki.flightgear.org/Howto:Adding ... n_aircraft<model>
<name>VSI 1 gauge </name>
<path>Aircraft/dhc8/Models/Instruments/vsi.xml</path>
<offsets>
<x-m>-8.927</x-m>
<y-m>-0.44</y-m>
<z-m>2.232</z-m>
<pitch-deg>0</pitch-deg>
</offsets>
</model>
<model>
<name>EFIS84 EADI-pilot fr 1900D ## same as asi z height! x is depth increasing negative vaue = further</name>
<path>Aircraft/dhc8/Models/Instruments/eadi.xml</path>
<offsets>
<x-m>-8.927</x-m>
<y-m>-0.552</y-m>
<z-m>2.382</z-m>
<pitch-deg>0</pitch-deg>
</offsets>
</model>
( note : the lines below use the original B1900D path to the instruments, no need to copy instrument files to dhc8 folder)
<model>
<name>EFIS84 EHSI-pilot fr 1900D see if it works</name>
<path>Aircraft/b1900d/Models/Instruments/ehsi.xml</path>
<offsets>
<x-m>-8.927</x-m>
<y-m>-0.562</y-m>
<z-m>2.232</z-m>
<pitch-deg>0</pitch-deg>
</offsets>
</model>
<model>
<name>RMI pilot</name>
<path>Aircraft/b1900d/Models/Instruments/rmi.xml</path>
<offsets>
<x-m>-8.927</x-m>
<y-m>-0.702</y-m>
<z-m>2.232</z-m>
<pitch-deg>0</pitch-deg>
</offsets>
</model>
Updating the liveries here:
viewtopic.php?f=13&t=16526&p=158708#p158708