Hi again,
firstly you need the FMProg software. You need to get Tadiran to supply a code to get this to work (if outside the US).
You'll probably have received a file named 123456.ex.zip (where 123456 is the SAU number). Inside this ZIP file is a file called 123456.ex.N. Rename this file to 123456.exe. Double click (run) this executable file and it will auto extract several files which are:
fmsl.s8m (or .4mb, .8mb depending) - the sys software
ola.om8 - the authorization file
readver.txt
verinfo.txt
versnum.txt
Open the ola.om8 file with notepad. This will show you the Authorizations you have.
You need to turn the system off, take the flash card out, plug it in your laptop, then run FMProg. From here you can load the new ola.om8 file but trying to explain it is not the easiest thing to do like this. It's easiest to have someone talk you through it and have it in front of you. I think you're in the UK so give Tadiran a call and they'll help. You don't need to extract these files, FMProg can use the exe but it shows you the components.
Once CVD is authorized I believe you can do online Authorization upgrades without having to down the system. I've never done it because once you get the hang of FMProg it only takes a few minutes.
Hope this helps.