Thanx Gouki, The following lines are from my .sif file: [Display] BitsPerPel = 16 Vrefresh = 75 ;; v1.4.008 - Changed from 800 to 1024 Xresolution = 1024 ;; v1.4.008 - Changed from 600 to 768 Yresolution = 768 I understand this to mean that after the unattended install has finished, the machine will boot into a resolution of 1024x768. What I need to do is that 'During' the unattend build process where the resolution is presently 640x480 change that to be at least 800x600. Thanx again for the reply Gary