You can not use ranged weapons with many maneuvers, however the mongoose line is a powerful exception. I think there is a thread discussing ranged swordsages that might be a help to you.

You need to look at individual maneuvers. Most say "you make a melee attack". If it does ranged is impossible. If it lacks that, such as the monggose line that just says "make additional attacks" which is generic and not just melee, then you can use ranged weapons with them.