Well, too bad that nobody has replied on my message yet. The good news is that i've made a little progress. It's possible to edit and activate the pagefile size through SETUPREG.HIV. Here's how to: (I suppose every WinPE user can start regedit, with a graphical shell click start, run, regedit. Users with commandline acces can just type regedit) start regedit Click on "HKEY_LOCAL_MACHINE" Click on "File", select "Load HIVE" At the filename box type "C:\Minint\SYSTEM32\SETUPREG.HIV" Regedit prompts "Load Hive, Key Name:" Type "WinPE" and press "Ok" Now go to "HKEY_LOCAL_MACHINE:WinPE:ControlSet001:Control:Session Manager:Memory Management:" Add a MultiStringValue (right mouse button, New:MultiStringValue) You'll see a string named New Value #1 Select the string, right mouse button, modify. Change the value data to: drive:\file.extension minsize maxsize For exapmle: C:\pagefile.sys 0 128 Call the string "PagingFiles" (select the string, right mouse button: "rename" Close all the expanded key's on the left Expand key "HKEY_LOCAL_MACHINE" Select key "WinPE" Click on "File", select "Unload HIVE" Close the registry and reboot. Does anyone know the key i have to edit to start paging automaticly at the boot of PE?