Firmware for RSB S2:
 * http://support.fujitsu-siemens.de/Download/ShowDescription.asp?SoftwareGUID=6DB401B3-B0BD-43CB-A3AA-6278B23FBCB0
 * http://support.fujitsu-siemens.de/Download/ShowDescription.asp?SoftwareGUID=4EC6401E-CA1A-47D8-A178-C75D91665CE2
Use the first link for a patchable firmware, the second is just an "update"
firmware which will not touch user settings and rights...

Documentation:
 * http://manuals.fujitsu-siemens.com/open.php?ID=4384
 * http://cp.literature.agilent.com/litweb/pdf/5988-8687EN.pdf
 * http://cp.literature.agilent.com/litweb/pdf/5988-8686EN.pdf

Software:
 * http://download.fujitsu-siemens.com/prim_supportcd/start.html
 * http://download.fujitsu-siemens.com/prim_supportcd/SVSSoftware/Software/Deployment/PRIMERGY%20Scripting/PRIMERGY%20Scripting%20Toolkit.msi
   (DOS utilities (spman.exe))

How to flash:
 * Download the firmware from:
   http://support.fujitsu-siemens.de/Download/ShowDescription.asp?SoftwareGUID=6DB401B3-B0BD-43CB-A3AA-6278B23FBCB0
 * Extract the .exe file with unzip
 * Place RSB_S2.bin, RSB_S2.001 and RSB_S2_SINGLE.bin in the tftpboot
   directory. Make sure that all three files are readable!
 * Initiate the firmware-upgrade from the web interface:
   - When upgrading from 6.x, flash the RSB_S2.bin file, which
     will automatically load the RSB_S2.001 file in the process
   - When upgrading from 7.x, flash the RSB_S2_SINGLE.bin
   WARNING: NEVER FLASH THE .001 FILES DIRECTLY, THIS WILL BRICK YOUR BOARD!
 * Modify RSB_S2_SINGLE.bin with 'firmware' and reflash ;-)
   (Don't try to modify the other files)