Hi Azhar,
Sorry I didn't get to your question sooner.

There are several directions that the 72MHz / 2.4 GHz can go. There is no sign of a total switching going on. A lot of people, including other major manufacturers are stating that there are appliations where 2.4 GHz will not work as satisfactory and you are better off with 72 MHz. Many people also want to wait out for a while and see how 2.4GHz "matures", which usually takes a year or two.
I personally think that there will be a future of coexistence. Weatronics is looking at the world wide market. We are working on a 2.4GHz system as well. There are different regulations for the different regions and countries. The systems have to adopt to all. I do not know when it will happen yet. Keep checking in at the Weatonic websites for updates.

You define the type of batteries (two choices Ni-Cad, Ni-MH / Li-Po) used in the basic settings tab of the receiver. It determines the switch over voltage when your receiver switches from the main battery to backup.
If you want to use Li-Ion batteries, you have to make sure that they can handle the loads, determined by the servos you arre using, since they do not have a current (amperes) peak discharge rate as compared to the others.

Regarding the regulators, there are six of them on board of the receiver. Two are reserved for the receivers individually. The other 4 supply the servos - in groups. See the manual for more detail. Through distribution of servos on these regulators you can avoid overloading the regulators on peak current withdrawal (up to 7 ams each). See the specs for more detail.

You can download the software and instuctions for free after registering and go through every scenario you can think of.

Thanks again,

Gerhard