for Band in a Box import, maybe just a """simple""" batch offline program would do the trick. This is not something you need in the main program, as once you have iRealbook I see no reason to continue to enter new songs in BiB.
T2G have an export function to BiB, maybe you can get in touch with he author.

http://members.shaw.ca/akochoi/artic...ide/index.html

It would be used only to avoid to re-key existing songs you have created.

Yverof