I don't know if is a bug or not... I integrated the Windows Power Shell (KB926140), no errors produced during integration, I'm used even a clean XP SP2 to test. But after the installation of Windows XP, the powershell executable and files simply don't exist (%windir%\system32\powershell\). I noted also that the files are not copied during the text mode part of installation. I looked on txtsetup.sif and they're not here too. If you can fix this, i will be grateful. Thanks so much.