Ah, yes... The factory limited ILO license.  And the forgotten password... If you have a console (or serial cable and a terminal), you can get into the BIOS using SETUP, and there's an option to configure the ILO password, even if you don't know it.  I guess you're local, so why stop you now?  ;-)

HP will let you download a 60-day trial key on their site.
http://h18004.www1.hp.com/products/servers/management/tryinsightcontrol/index.html

Can't help with the 64-bit stuff.  I found out my little "64-bit" Core2 Duo in my Dell can't run ESXi in a VM under Fedora 10 x64.  I had to try...  Time for a vPro?

wes