Convert them to type 1 midi file then they should just drag n drop in the old RealBand.
MIDIFileMapper & MIDIFileConverter NAudio

For syncing old RealBand:
Slave Reaper to Biab/RealBand with Midi Sync

To get vst's that don't load to work try MiniHost


Attached Files (Click to download or enlarge) (Only available when you are logged in)
MIDI-File-Converter_.jpg (155.18 KB, 20 downloads)