We had some problems early on with the initial version of HP's PSP on our HP DL380 G5s and Server Core. The problems seem to have been resolved in the latest (8.15) version of the PSP. To install it, simply extract the PSP to a directory and run the setup.exe from the command line in Server Core. You'll get the standard HP GUI to guide you through the installation (or you can use setupc.exe for the commandline driven installation). The only "note" is that you'll have to install the SNMP service before hand by using the command "start /w ocsetup SNMP-SC".