Sorry not really sure if you mean RealCharts for the RealTracks ? But have a look at Guitar Pro 6 or Tabledit you can import midi and edit individual strings and put in HO PO Bends Slides Vibrato etc...

EDIT:
Options for Midi Files (not RealCharts)
Write Guitar part on 6 channels

If set to YES, the styles that are Intelligent Guitar Styles will result in a MIDI file that has the Guitar part written on 6 channels (11-16). Then, when you read it in PowerTracks, or another sequencer that uses the convention of 11-16 for guitar strings, the guitar part will display correctly.