It would be nice to be able to drop HEX codes on individual function right in the programming menu,  instead of firing the ir codes from a remote.  This would be very helpful for integrators, as we all use centralized processors to fire IR codes to IR bugs...this way we could just choose the proper IR codes in the software program them to the remote (crestron/rti/urc) and apply the proper hex code to the flirc buttons.

Flirc doesn't use neither pronto nor any other standard IR codes. It calculates a hash value from a signal using a proprietary algorithm, which is optimised for receiving and quickly recognising the signal, in opposition to pronto hex (or possibly other) which are primarily for generating and sending one.