Just a thought, if you can't get the permissions for the SQL Service account sorted out. You can always raise makewebtask from the dead, if you still have a 2008 instance with the .dll sitting around somewhere:

--EXEC dbo.sp_addextendedproc N'xp_makewebtask', 'C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\Binn\xpweb90.dll'

--EXECUTE master..xp_makewebtask