Combining staffs?

Hi Folks,
I have three (!) piano lines from a MIDI file that I need combined into a single piano part (2 x RH, 1 x LH).
Does anyone know if this is possible?
Cheers,
Ed
NB: I was going to try "Paste Insert" to combine the parts, but I need to merge two of the lines, and insert therefore will not work (?)
I have three (!) piano lines from a MIDI file that I need combined into a single piano part (2 x RH, 1 x LH).
Does anyone know if this is possible?
Cheers,
Ed
NB: I was going to try "Paste Insert" to combine the parts, but I need to merge two of the lines, and insert therefore will not work (?)