I runned MP Troubleshooter (pre-installation) and it passed. Also event viewer looks ok, except those mp install errors.
I also tried your next suggestion and metabase.xml seems to be ok.
Metabase.xml
WebSvcExtRestrictionList="0,C:\WINDOWS\system32\inetsrv\httpodbc.dll,0,HTTPODBC,Internet Data Connector
0,C:\WINDOWS\system32\inetsrv\ssinc.dll,0,SSINC,Server Side Includes
1,C:\WINDOWS\system32\inetsrv\asp.dll,0,ASP,Active Server Pages
1,C:\WINDOWS\system32\bitssrv.dll,0,BITSEXTS,BITS Server Extensions
1,C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\aspnet_isapi.dll,0,ASP.NET v1.1.4322,ASP.NET v1.1.4322
0,*.exe
1,C:\WINDOWS\system32\inetsrv\httpext.dll,0,WEBDAV,WebDAV
0,*.dll"
And list from listextension.vbs:
ApplicationDependencies property:
Active Server Pages;ASP
Internet Data Connector;HTTPODBC
Server Side Includes;SSINC
WebDAV;WEBDAV
ASP.NET v1.1.4322;ASP.NET v1.1.4322
ASP is enabled
ListExtensionFiles method:
C:\WINDOWS\system32\inetsrv\httpodbc.dll
C:\WINDOWS\system32\inetsrv\ssinc.dll
C:\WINDOWS\system32\inetsrv\asp.dll
C:\WINDOWS\system32\bitssrv.dll
C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\aspnet_isapi.dll
C:\WINDOWS\system32\inetsrv\httpext.dll