Yen i think you mistake this file with dell.xrm-ms which must be used with correct slic. dell.xml is used for unattend installation, but i don't know if this file is modifcated in other dell versions. I think there can be differences in lines: or
I have Dell Vista Home Premium x86 and the DELL.XML in SOURCES\$oem$\$$\Setup\Scripts is the same. the only thing you need to do is change the number in the PID.txt file in sources and install.wim the make any version you want)