Hi Tony
If I understand you correctly you want to transpose a midi file to a key to suit your playing. If so, Program Menu>Sequencer>Range Edit>Transpose.
Transpose ALL tracks from 1st to Last measure of the midi file + or - 1 for each semitone (Eb to C would be -3) Then select the drum track (normally 10) and change it back to it's orignal key (+3 in the example shown) otherwise the drum track will not play correctly.
John