If you are seeing any failures in your log around setting the hostname during a Remote configuration it could be due to a underscore in the host name. Check out Terry Cutlers post on altiris juice @ http://juice.altiris.com/tech-tip/1622/underscore-not-supported-in-intel-amt-hostnames . Terry references the RFC952 - DoD Internet host table specification @ http://www.faqs.org/rfcs/rfc952.html. Here are the assumptions from that specification.

ASSUMPTIONS

1. A "name" (Net, Host, Gateway, or Domain name) is a text string up
to 24 characters drawn from the alphabet (A-Z), digits (0-9), minus
sign , and period (.). Note that periods are only allowed when
they serve to delimit components of "domain style names". (See
RFC-921, "Domain Name System Implementation Schedule", for
background). No blank or space characters are permitted as part of a
name. No distinction is made between upper and lower case. The first
character must be an alpha character. The last character must not be
a minus sign or period. A host which serves as a GATEWAY should have
"-GATEWAY" or "-GW" as part of its name. Hosts which do not serve as
Internet gateways should not use "-GATEWAY" and "-GW" as part of
their names. A host which is a TAC should have "-TAC" as the last
part of its host name, if it is a DoD host. Single character names
or nicknames are not allowed.