The test results you have selected are very old and may not represent the current state of Wine.
Selected Test Results (selected in 'Test Results' table below)
What does not
Commandline powerpoint conversion
What was not tested
1. Install Office 2003 SP3
2. Download FileFormatConverters.exe
3. Install FileFormatConverters.exe
4. Download microsoft.vc80.crt.zip from online (I googled it)
5. Extract the contents of the zip file to the Office12 folder
To get SP3 to install I had to put the pa561401.cab file in the windows/Installer folder.
To get powerpoint converter to work I suspect that a wine version of t2embed.dll will be needed.