[Shoot through prison bars]

There is such a mod, but I cannot find it anymore. It did a bunch of stuff with physics... I'll post back if I find it :)

[Crossbow Mod]

How about someone make a mod like the flintlock pistol? Where it's just a "unique staff"...

Just replace the flintlock model with the crossbow model, the projectile with a bolt, the sound files with crossbow sounds from somewhere else (possibly dawnguard), textures and so on...

 

Voila, easy one handed crossbow :P The animations aren't even that bad, when u charge the staff it's like u draw the bolt, and since onehanded crossbows are for shorter range, u like move ur hand towards the target when u fire.