How to put in a Non-Standard Key Signature?

[LennyMM]

To transcribe an old Swedish folk tune, I need to indicate a key signature (using the G Clef) which has the F sharp followed by a B flat. The piece is close to G minor, but in a non-standard mode(?)

Is there any way to do this in Sibelius 3.1?

Thanks.

[vilnai]

There is no good way to do this. The workarounds are pretty painful. If you really really need it, finish the piece, make sure that all the layout is done, then lock format and add the accidentals as symbols at the beginning of every system.

There's a way of working around by editing clefs, but it's a little messy, and I'm not sure how well it will work in Sib 3.