Disable spell check on powerpoint 2007 using Office Customization Tool

[adhisakti]

I'm using Microsoft Office 2007 Enterprise with SP1 file placed in Updates folder. Then i create the MSP file to install silently with Setup.exe /admin. I modify some options in user settings. I want to turn off all the spell check features, all the other options works fine, but in PowerPoint, it still checked after install. I have been disabled the "Check spelling as you type" option in Microsoft PowerPoint 2007 -> PowerPoint Options -> Proofing. Anybody has the same problem?