Do yourself a BIG favor....DUMP that 6H radio..It will be more hassle than it is worth to setup a HH gyro like the 401 or 240 and to try and get any kind of decent pitch/throttle curves.
Get a 6 channel (minimum) computer radio for it. If you have a computer radio then switch it out. If not you can pick up an Airtronics 6 channel for a very good price and it is a VERY capable radio.
I worked with one of those 6H's once and I was confused trying to get it setup properly with the heli (been doing this for almost 3 years and on many helis).