It could be the ghost bootdisk/driver you are using.
Have you tried creating a Bart Network Boot Disk with the broadcom (B57) driver?
http://www.nu2.nu/bootdisk/network/

I have had good luck with this method.
-Tram

I am having the same issue with our d800. I created a broadcom ghost boot disk and it works well on a desktop and doesn't work in our d800. 

I downloaded this driver and it worked. I have downloaded no less than 5 differnt versions of the B57.dos driver and this one seems to have done the trick. However, I did notice one thing. I used the Ghost Boot Wizard to create my NDIS bootdisk. I pointed it to the dir where I extracted the b57.cab file. But when the disk was done, I opened it and found that the B57.dos file it was using did not match the one in the b57.cab file. So I copied the b57.cab version to my boot disk and it worked! It may be that this was the problem with all the other versions I downloaded, they were never actually getting onto the floppy.

Good luck!

Havein exactly the same problem. I have 2 D800's and the problem occurs on both. Seem's we have a theme here, no?

My bad! I didnt give you the URL for the driver.

http://www.nu2.nu/download.php?sFile=b57.cab

Incidently, I also just bought 2 D500's they did not have any problems at all.

I have the latitude D600 with the same nic. ghost locked up every time at almost the same point. What made it worse was no floppy drive. Even with figuring how to boot from the usb drive or the cdrom it still wouldn't work. Finally updated the bios from A05 to A06. That fixed everything.

Thanks, that driver worked for me too!  Using ghost 7.5 bootdisk, added that driver and imaged fine.

Glad I found this forum... My company just received a shipment of Inspiron 600m's and I the same problem with Ghost 7.5 Corp. Ed. locking during image dumps.  Tried everything listed above (lastest Broadcom driver/ghost.exe switch, etc..) and the only thing that worked was mbfromit's link to http://www.nu2.nu/download.php?sFile=b57.cab.  Pulled down the driver and added it to Ghost Bootwizard setup and was up and running in 5 minutes.

Good work mb.

This worked for me as well and I had the issue with the D600 series.  This was a great find, and it saved me tons of time.  Thanks!!