Oh yeah,
The G5000T is the most feature-rich of the JR gyros. I've never used one, but it absolutely has every feature that any other gyro might have.

If you don't have your manual, you may be able to download one here: [link=http://www.rchelis.com/manuals/JRPG5000Tman.pdf]http://www.rchelis.com/manuals/JRPG5000Tman.pdf[/link]

To switch from HH to rate you can simply flip a switch on your gyro amp. There is a switch for tail lock. On and off. Also, you don't need to plug the two aux connectors into your receiver. You can set the sensitivity with a tiny screwdriver. Look at the light on your gyro amp. Red = rate. Green = Tail-lock.

The better way is to decide which switch you want to use on your 8103 and set it up. In the programming of the 8103 it suggests to use the rudder d/r switch. Folks at your heli field will suggest that you use your gear switch. Pick one. They program differently. The Aux2 connector controls everything. Forget about using your Aux3 connector for now.

Let's talk about the Aux2 connector and how it tells the gyro what to do: The Aux2 connector is just like any other servo channel, it has positive values, a center, and negative values. If you send the gyro the center value, it tells the gyro to do nothing. Yes, it's just like not having a gyro at all. If the Aux2 channel tells the gyro to have a negative value, then you are telling it to work in rate mode. A greater negative value is more gain for rate mode. So a full negative position is 100% rate mode sensitivity. This works the same way in the positive direction, except this time it specifies tail-lock mode. A full positive position is 100% tail-lock sensitivity.

I'm using the rudder d/r switch. With that technique, you go to the [GYRO SENS] page and set the channel to Rudder D/R Then set the positions below. I set my tail-lock sensitivity to be on position0 and I set my rate mode to be on position1. There is an interesting trick here. Notice that the numbers only go from 0 to 100? Where are the negative numbers? There aren't any. Don't fret though. Consider that 50 is the center. Anything below 50 is rate mode and anything above 50 is tail-lock mode. There is a trivial formula to convert this back to percentage. Input 70%, subtract 50, then double it. (70-50) = 20... 20 * 2 = 40%. A setting of 70% on the screen means "tail-lock mode at 40% sensitivity."

Here's the chart:
For use on the [GYRO SENS] page of the 8103 only.
Onscreen In Gyro
90% = 80% HH
80% = 60% HH
70% = 40% HH
60% = 20% HH
50% = 0%
40% = 20% rate
30% = 40% rate
20% = 60% rate
10% = 80% rate

There are others who use the gear switch for this same feature. I went in and looked at the settings for servo travel. You can set the positive travel with one value and the negative travel with another value. This prevents you from setting two different rate values or two different tail-lock values. If using the gear switch, it looks like each position must be in a different mode.

If one setting in each mode is not enough for you, then you should look into the features of the Aux3 connector. I don't need to complicate my life that much, so I didn't read about doing that. Aparently it is actuated by the flight mode switch.

-Mark