Escalated to Bugzilla from IssueTracker
Pasting from Issue Tracker.... xw4200 and xw8200 RHEL4PreRC1 x86-64 - /var/log/messages indicates "firstboot: succeeded". No longer see the activate modules error, but it does take about 5 minutes for firstboot to appear. During that 5 minutes, the screen is blue/grey and the mouse cursor can be moved around (the system looks hung). This looks like 52246 (RHEL3U4), but this is filed against RHEL4.
Duping this against bug 142332, as that's also an HP bug and has far more details about what's going on. *** This bug has been marked as a duplicate of 142332 ***