I can see the command I need to run from the link below. of how to do it. However it looks like when it is done, it requires a reboot. Does this reboot the whole ASA or just the CX module (see below). You are inside of the CX module, so I am guessing just the CX. But would like validation. :) Thanks!
http://www.cisco.com/c/en/us/td/docs/security/asacx/9-1/user/guide/b_User_Guide_for_ASA_CX_and_PRSM_9_1.pdf
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prsm-vm> system upgrade http://upgrades.example.com/packages/prsm-sys-9.0.2.pkg
Verifying
Downloading
Extracting
..
..
Upgrading
Starting upgrade process ...
Extracting the upgrade image
Updating the system and network configuration
Reboot is required to complete the upgrade. Press Enter to reboot the system.
(press Enter)
Broadcast message from root (pts/0) (Tue May 15 22:50:17 2012):
The system is going down for reboot NOW!