I was just thinking , you should still be able o make a full backup without the need for a script , as the software would/should detect your flash and allow you to back it up.
However here is the script for the SBV5120 , you will need to do a couple of things first , as i noticed there may be a bug in the software regarding this :
Firstly add this line to your Autorun.ini file in the script folder 0000100F:SBv5120_JTAG.bcs:SBv5120
UPDATE : Bug is resolved , new line added to script