is there a gauge available which can be installed into any panel which adds a trim sound?

Sure there is. It's not available as a single download any more (at least not here at Avsim). So download this:http://library.avsim.net/download.php?DLID=6983 and then reference Your panel.cfg to fpda_trim_sound.gau andYou'll have what You're looking for.

ah! thank you very much! :9so i just need to add the line gauge04=FPDA_TRIM_SOUND, 10, 10to my panel.cfg? will that also work in the VC?

No way! You can NOT do this by simply adding "gauge04=FPDA_TRIM_SOUND, 10, 10" to another panel.cfg ! In one particular panel this gauge was listed as the fourth one. Look at the panel.cfg of the aircraft that You'd wish to add this gauge to, and go down to the end of the list of gauges in section[WindowXX] that indicates Your main panel. You can identify which window represents Your main panel by comparing what You see in 2D panel in the simulation by the bitmaps in the panel folder. Here's the excerpt of the default B737_400 panel.cfg and if You'd want to add the trim sound to this panel:[Window00]file=Main_640.bmpfile_1024=Main_1024.bmpsize_mm=640position=7visible=1ident=MAIN_PANELgauge00=737-400!Airspeed, 0, 64gauge01=737-400!Flaps, 586, 64gauge02=737-400!Altimeter, 237, 45gauge03=737-400!Vertical Speed, 238, 128gauge04=737-400!Fuel Quantity, 236, 204gauge05=737-400!Main Set, 335, 85gauge06=737-400!OMI Lights, 1, 153gauge07=737-400!Oil, 468, 85gauge08=737-400!Clock, 17, 147gauge09=737-400!RMI, 1, 211gauge10=737-400!HSI, 86, 162gauge11=737-400!ADI, 85, 39gauge12=737-400!Gear Lever, 586, 217gauge13=737-400!Nose Gear Light, 594, 180gauge14=737-400!Left Gear Light, 579, 198gauge15=737-400!Right Gear Light, 609, 198gauge16=737-400!Reverser Unlocked Left, 354, 68gauge17=737-400!Reverser Unlocked Right, 416, 68gauge18=737-400!AT Lim, 385, 68gauge19=737-400!Low Oil Left, 458, 68gauge20=737-400!Low Oil Right, 519, 68gauge21=737-400!Start Valve Left, 489, 68gauge22=737-400!Start Valve Right, 549, 68gauge23=737-400!Flaps Ext, 609, 115gauge24=737-400!Flaps Transit, 579, 115gauge25=737-400!Autopilot, 336, 11gauge26=737-400!Pitch Trim, 305, 144gauge27=737-400!Aileron Trim Indicator, 242, 261gauge28=737-400!Aileron Trim Switch, 248, 276gauge29=737-400!Rudder Trim Indicator, 285, 261gauge30=737-400!Rudder Trim Knob, 290, 276gauge31=737-400!Nav GPS Switch, 306, 17gauge32=737-400!Avionics Master Switch, 239, 300gauge33=737-400!Autobrake, 581, 134gauge34=SimIcons!Kneeboard Icon, 181, 10gauge35=SimIcons!ATC Icon, 194, 10gauge36=SimIcons!Compass Icon, 264, 10gauge37=SimIcons!ECU Icon, 250, 10gauge38=SimIcons!Map Icon, 208, 10gauge39=SimIcons!Avionics Icon, 222, 10gauge40=SimIcons!GPS Icon, 236, 10 -------- original--------------------------------------------------------------gauge41=FPDA_TRIM_SOUND, 10, 10 ---- we add thisas You can see I used NEXT free number and there's one more thing:the numbers 10,10 are gauge coordinates. It is not advisable to overlay two gauges, so we need to find a spot on the bitmap that's free, even 10,10 is O.K., but why not use 0,0. This gauge has no bitmaps, so it's not wisible anyway and 0,0 puts it in the top left corner and away from anything else.Hope this helps . . .

thank you very much, i know that stuff with the next free number, i was just not sure how to add it to the VC :)