There are some MPEG4 codecs listed in your above list (H263)
However MPEG4 comes in a number of variants. Just looking at my copy of VideoStudio 11.5+ I see the following

and
Did you install this update patch
Ulead VideoStudio 10 Vista Pack (Release Date: 2006/12/22)
If so please read the small print:
NOTEs:
* Windows Vista and the Windows logo are trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries
* This Update Pack is for Ulead® VideoStudio® 10/10 Plus (BOX, ESD, UPG, and activated TBYB) version.
* This Update Pack cannot be uninstalled.
* Since Video for Windows (VFW) is not supported in Vista, VFW codecs such as Indeo, Cinepak are not supported in Vista. The video content files provided by VideoStudio will now be encoded using .WMV instead of Indeo codecs.
* Some 3D transition effects that won¡¦t be supported on Vista are removed from current release, including: Flying Board, Flying Cube, Flying Flip, Flying Fold, and Folding Box. Some templates under "Album", "Flash Light" and "Mask" transition effect are also not supported.
* WDM devices are not supported by Vista. Thus, not supported by VideoStudio.
* WMV and MPEG 4 format CAPTURE is not supported.
* MOV and MPEG 4 formats are not supported in this version.
* WinDVD 7, PocketDV show, and Cool3D are not supported.