Slow Booting Leopard (Blue Screen)

I was trying to tweak my boot time of leopard. It shows a blue screen for a long time before showing desktop. I checked log and found a few problems and deleted and unloaded various services (I removed machinit_peruser.d and mach_init.d folders and inloaded com.apple.dnbobserver.plist. Finally I think I got the problem in the log but I am not sure of the solution to tweak it.
this is the log which seems culprit to me.
+08/05/08 4:31:41 PM com.apple.launchctl.System[2] com.openssh.sshd: Already loaded+
+08/05/08 4:31:52 PM org.ntp.ntpd[25] Error : nodename nor servname provided, or not known+
+08/05/08 4:32:14 PM com.apple.launchd[1] (com.apple.UserEventAgent-LoginWindow[78]) Exited:Terminated+
So majority of blue screen time (almost 23 seconds) is spend here. Any idea what is is this UserEventAgent thing or org.ntp.ntpd stuff and any suggestions to shut them off.
I am sure many users have the same problem. If someone could find out why is this happening, I am sure it is resolved issue.

More Updates:
I figured out org.ntp.ntpd is related to time server thing. So disabling auto time updates, i narrowed down to the following log
+08/05/08 4:59:31 PM com.apple.launchctl.System[2] com.openssh.sshd: Already loaded+
+08/05/08 5:00:10 PM com.apple.launchd[1] (com.apple.UserEventAgent-LoginWindow[78]) Exited: Terminated+
+08/05/08 5:00:13 PM Dock[95] _DESCRegisterDockExtraClient failed 268435459+
+08/05/08 5:00:15 PM [0x0-0xf00f].com.apple.iTunesHelper[107] USBMuxListenerCreate: No such file or directory+
So I guess I am pretty sure, blue screen has something to do with com.apple.UserEventAgent-LoginWindow. Can anyone tell me what it is and can we safely unload it from launch agents and how?

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