Need a quick sed recipe :-(

[Steven W. Orr]

40 Quatloos to the winner.

Here's what I need:

Look for a marker in a file and delete the line with the marker. Then 
insert file2 at that location.

I have

sed '/MARKER/d' file
and I have
sed '/MARKER/r file2' file
but I'd like to just put the two together in one sed command. (Two -e 
options don't count.)

Anyone? :-(

-- 
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steveo at syslang.net