Cisco ACS re-imaging with CIMC

The Cisco 3415 ACS appliances came pre-loaded with 5.8 and I need to re-image to 5.4. Looking at the documentation below it looks like the two main options involve CIMC or installing from USB. Can I enable CIMC from serial console port connection? Or is KVM access required?
The devices are at a distant location and the less need for remote hands the easier it all is.

http://www.cisco.com/c/en/us/td/docs/net_mgmt/cisco_secure_access_control_system/5-4/installation/guide/csacs_book/csacs_ovr_ucs.html

Or is there a means to entirely downgrade the device via the management GUI, console or SSH connection that does not require CIMC?

Thank you.
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amigan_99Network EngineerAsked:
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Craig BeckConnect With a Mentor Commented:
You can enable CIMC by connecting the port to a network running DHCP.  The CIMC interface will obtain an IP then you can web-browse to the CIMC and do everything you need from there.  You'll be able to mount the ACS ISO via remote KVM through the browser.
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amigan_99Network EngineerAuthor Commented:
Thanks much Craig.
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