Keeping up to date firmware ? (Fuze+)

[xpmule]

What i did a few days ago is grab the Auto Install Tool
and used it and I'm running ok but i also downloaded the simulator
and it was using a different version so i dumped the players files
and put them from my player into the simulator.
Now i just seen a link to manually install..
(http://www.rockbox.org/wiki/SansaFuzePlusPort)
http://build.rockbox.org/data/rockbox-sansafuzeplus.zip
So I'm a bit confused here what I should be doing so i can be using the new versions

Can anyone help me sort this out ?
I want to test my themes i'm working on with my simulator that will match my player
and if iuse the current version i can help report bugs etc maybe too

[saratoga]

If you want to manually install, just unzip the new build over the old.

[xpmule]

thanks i figured that but i was wondering about the update procedure.
like how to know if there is new build stable or not etc
all that stuff..