Another Dell OEM CD slipstream quandry

[sempei]

I have a Dell reinstall CD that I cannot seem to get a functioning CD with SP2 slipstreamed using Nlite. Trying to install the first disk I slipstreamed, the first error I got was upon copying the system files it siad "USBEHCI.SYS is corrupt cannot continue. Upon Gooling the internet I found somebody who got around that by replacing the copy of i386\NTKNRLMP.EXE. So I tried this and burned another ISO. This seemed to work, copying all the files needed for setup, until it rebooted to start setting up and I got the error "NTFS.SYS is missing". I have checked the CD and NTFS.SYS is in the i386 folder. My original Dell CD has no service pack integrated but has some hotfixes which Nlite stripped out.Ideas anyone? Please help