Hi Tom,
A few weeks ago I looked at St Matthews, Douglas, baptisms for 1718-1849 on LDS film number 0106718. The baptisms for 1849-1883 are on LDS film no. 0106186.
The film has gone back, so sorry I can't check to see whether it had marriages and burials as well, but if you look up the LDS catalogue on CD it will give the full list. The Internet site doesn't seem to have all of them listed - or it is my computer - which says film no.0106718 doesn't exist!
Sue