I know that I am going to regreat this, but I need to jump in anyway.
viet5d with the lack of knowalge that you have admited to and shown, why are you trying to do some thing as advanced as a firmware upgarde, that you do not even need to do?
Leave the radio along until you have a better under satanding of radio's and how they work.
rtm8575 I have to also ask you, why does your department think you need to upgrade the firmware?
Where your radios acting up to the point that maybe doing a firmware change would help correct the problem?
For the most part, if a radio is working correctly, then a firmware upgrade is not needed even if the manufacture releases a new version.
Check the changes in the newer version, and if it is just a simple addon and you really do not need it, then for the most part you do not need the up grade.
Upgradeing firmware for the sake of upgrading is usally more trouble then it is worth.
It is like currently driving a 2009 x car modle y and now there is a z mod that does not do anything major, but every one wants it.
If a radio is working, leave it alone.