Error attempting to boot from Onboard NIC

I posted this message on the wireless forums but they said y'all might help me here. So, here goes, with pretty much copy and paste:

http://www.dellcommunity.com/supportforums/board/message?board.id=si_wireless&thread.id=34709

First, I have a Dell Latitutde D600 with Windows XP Professional.

My first post in that thread:
"Anyway, I almost always get this error message upon starting my computer.

ERROR attempting to boot from Onboard NIC.
Software error: device not in BEV locator.
Press any key to continue.

This message always comes up directly after the DELL startup screen (the one where DELL is in huge white letters and the progress bar goes by on the bottom). After that it will proceed with a normal boot and usually everything is fine.
Occasionally, however, the computer will randomly hang/freeze/stop responding. This will, if it happens, tend to occur about five to ten minutes after everything has finished booting up. I will have to restart.
Also, and less frequently, I will get a BSOD. After restarting here I will have to adjust the clock in the setup before the computer actually boots. Then, once on, the error report will come back mentioning a driver error.
Finally, I recently downloaded the DELL Crash Analysis Tool. After running it and fixing most of the problems (only two are left: cdudf_xp.sys and NavEx15.sys) I'm still getting the above-mentioned error message after each restart (I've had to restart many times after installing and such to fix some of the things the Crash Analysis Tool returned).
The strange thing is that most of this time this message will come up but will do nothing to hamper my computing once everything is booted up and working. Still, the hanging and BSOD is frequent enough that this has frustrated me to no end. I would appreciate ANY help ANYBODY can provide me. Thanks a bunch."

Another user suggested that I try fixing the boot order so this is what that is when I looked at it:

Boot Order

*Diskette Drive
*Internal HDD
*Onboard NIC
*USB Storage Device
*CD/DVD/CD-RW Drive
Modular Bay HDD
Cardbus NIC
D/Dock PCI slot NIC

* = enabled device

The user suggested possibly moving Onboard NIC farther down the list. What do y'all think here? Disable it completely? Move it to below CD/DVD/CD-RW Drive? Any help is appreciated.