saxy831 it really depends on who actually created that SMF. Most will probably have an inserted patch assignment, but most fall short on the drum track. Its usually assigned to channel 1 ??? why is beyond me, since drums are usually set to channel 10 or 11. I have seen so called pro SMF files with patch assignments to a external synth modual, when it should be GM.
So there will be some (most) track assignments that need to be updated after you import.