To perform this upgrade please perform the following steps.
 
1) Download the appropriate 594 Controller sofware image file to
   a temp directory on your PC.
	SYS0510.IMG	- 594e Base Controller V05.10T5
	SYEI0510.IMG	- 594e IP Routing Controller V05.10T5
	SYEV0510.IMG 	- 594e IP Routing with VPN Controller V05.10T5
	SYST0510.IMG	- 594T Base Controller V05.10T5
	SYTI0510.IMG	- 594T IP Routing Controller V05.10T5
	SYTV0510.IMG	- 594T IP Routing with VPN Controller V05.10T5
2) Download the fdup utility (fdup.exe) to the same temp directory.
3) Type the following command from this temp directory to create a
   bootable 594 controller disk on a 3 1/2" floppy disk.
	fdup filename a:
  Where filename is the name for the controller software image you 
  downloaded in step 1).

Please view the installation instruction provided with your 594 controller to perform the upgrade.