I have included the batch file which starts WPI in my WINNT.SIF at the [GuiRunOnce]. Now, the weird thing is this: the mshta.exe process is running but the HTA isn't showing up. If I go to the wpi folder, where wpi.hta resides using Windows Explorer, the file has no association (the icon of the file is the "unknown" type of icon). Actually, if you double click the wpi.hta file, the OPEN WITH dialog shows up. Now, how do I get my Windows XP to open the HTA file without any user intervention? (maybe like a REG patch or something?) I exported everything related to ".reg" (did a search) from my current installation -which is able to open HTA files- using REGEDIT, and I merged them all in the New installation and it still couldn't OPEN the HTA file, although it now recognized the HTA file as "HTML Application". So now I'm stuck with an installation of Windows XP PRO SP2 (some windows update patches slipstreamed) which knows what the ".hta" extension stands for, but it's unable to open it, unless I, the user, browse to "%WINDIR%\system32" in the OPEN WITH dialog, and select the "mshta.exe" as the program to open the file with. That's not an unattended installation, for sure... New XP installation specs: Windows XP Professional slipstreamed with SP2, SVCPACKed with the folowing: [SetupData] CatalogSubDir="\i386\SVCPACK" [ProductCatalogsToInstall] KB911565.CAT KB911564.CAT KB873339.CAT KB885250.CAT KB885626.CAT KB885835.CAT KB885836.CAT KB886185.CAT KB888113.CAT KB888302.CAT KB890046.CAT KB890859.CAT KB891781.CAT KB893756.CAT KB894391.CAT KB896358.CAT KB896422.CAT KB896423.CAT KB896424.CAT KB896428.CAT KB899587.CAT KB899589.CAT KB899591.CAT KB900725.CAT KB901017.CAT KB901214.CAT KB902400.CAT KB904706.CAT KB905414.CAT KB905749.CAT KB905915.CAT KB908519.CAT KB910437.CAT KB911927.CAT KB912919.CAT KB913446.CAT Has anyone experienced this before?