You'll need to navigate thru IBM's web site to get firmware updates & instructions.
You can start here-->
http://www-03.ibm.com/servers/eserve...dinghwaix.html
then --> select MICROCODE UPDATES
then --> "7026-6H1" from the drop down menu,
then --> DESC for a description of the latest firmware for your box.
If the instructions aren't clear, then you really should open an incident with IBM Support...... and ask for clarification of any steps in the process.