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I've had a similar issue with the Dell partition. The easiest way for me was to capture an image of the partition with imagex, and add it to my imaging process. This is the diskpart script that I use: select disk 0 clean create part pri size=50 id=DE create part pri size=18000 create part pri select part 1 assign letter=q select part 2 active assign letter=c select part 3 assign letter=d exit This clears all existing partitions, and creates a 50 meg hidden Dell partition, a 18 gig C drive, and the rest of the drive for a D drive. I use the following batch file to call the diskpart.txt script, and to apply the images: @ECHO Off diskpart /s x:\IMAGE\diskpart.txt CLS ECHO Disk partitioning complete sleep 5 CLS ECHO Formatting C: Drive format C: /FS:NTFS /V:SYSTEM /Q /y CLS ECHO C: Drive format complete sleep 3 CLS ECHO Formatting D: drive format D: /FS:NTFS /V:DATA /Q /y CLS ECHO D: Drive format complete sleep 3 CLS ECHO Formatting OEM partition format Q: /FS:FAT /y CLS ECHO OEM Partition format complete sleep 2 imagex.exe /apply x:\IMAGE\OEMPARTIMAGE.wim 1 q: CLS ECHO OEM Partition imaged successfully sleep 3 CLS ECHO Imaging C: Drive imagex.exe /apply x:\IMAGE\CDRIVE.wim 1 c: CLS ECHO C: Drive imaged successfully sleep 3 CLS ECHO Imaging D: Drive imagex.exe /apply x:\IMAGE\DDRIVE.wim 1 d: CLS ECHO D: Drive imaged successfully sleep 3 CLS ECHO IMAGE COMPLETE!!! sleep 5 Exit This turned out to be a lot easier than trying to preserve the existing OEM partition. Hope this helps.