Probably not with 4.0(4).... there are two many complicated steps involved. Possibly in the newer versions it may work.
The following out-of-band management cards are supported for use with Cisco Unity 4.2 and later:
?Dell Remote Assistant Card, version 2.0.
?Hewlett-Packard Integrated Lights Out (iLO).
?Hewlett-Packard Remote Insight Lights-Out Edition, all versions.
?IBM Remote Supervisor Adapter II, all versions.
CallManager is a different horse... you can autoinstall that pretty much.... but Unity involves AD, SQl, Exchange and all sorts of "stuff" that involve a monkey hitting key strokes and following instructions for installation.... flying monkey? possibly.
hope this helps
http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_system_requirements_hardware09186a008061eab9.html