HI,
it should be the same like for all other switches (read UG).
Before begin it read the RN for the new SW. especally read the step from your current to the wished new sw and if you need new miniboot/uboot after the image update. Sometimes is necessary to make one between it (for upgrading miniboot...).
You need the zip-file. load this into OV (there is an icon at the top). Then mark this new loaded version and use the other icon. A wizard will start. go forward until message successful.
Than you can make a reboot from working (in topology windows). And at last copy working to certified.
Silvio