Cannot install gallery (2.1rc4 + SQL Server)

After trying to install gallery I gat the following error:

Console running...
Attempting to install package with signature: gallery-1.2.0-rc1
Package found...now preparing to install.
Grabbing package workspace...
Workspace environment initiated, now installing package...
Skipping vehicle object of class modSystemSetting (data object exists and cannot be upgraded); criteria: Array ( [key] => xhtml_urls )
Could not load class: galItem from sqlsrv.galitem.
Could not load class: galAlbum from sqlsrv.galalbum.
Could not load class: galAlbumItem from sqlsrv.galalbumitem.
Could not load class: galAlbumContext from sqlsrv.galalbumcontext.
Could not load class: galTag from sqlsrv.galtag.
Could not load class: galAlbum from sqlsrv.galalbum.
Could not get table name for class:
Could not load class: galAlbum from sqlsrv.galalbum.
Could not get table name for class:
Could not load class: galItem from sqlsrv.galitem.
Could not get table name for class:
Could not load class: galItem from sqlsrv.galitem.
galItem::loadCollection() is not a valid static method.
PHP warning: Invalid argument supplied for foreach()
Could not load class: galItem from sqlsrv.galitem.
Could not load class: galAlbumItem from sqlsrv.galalbumitem.
Could not load class: galItem from sqlsrv.galitem.
galItem::loadCollection() is not a valid static method.
PHP warning: Invalid argument supplied for foreach()
Successfully installed package gallery-1.2.0-rc1

My configuration is: MODX Revo 2.1rc4 Traditional, OS is Win Server 2008 R2, IIS 7.5, on SQL Server database 2008 express, PHP is 5.3.6.

Does anyone have solution to this?

I don't believe Gallery supports the sqlsrv driver at this time.

Are there any solutions around it at the moment? or other 'gallery' type extra that supports sqlsrv?