http://www.nexusmods.com/skyrim/mods/58973/?
I know quite a few people here have been wanting something like this so I thought I'd post the link. This mod allows the player to seamlessly switch from using a 2h weapon to using it as a 1h weapon and vice versa! Also it continues to draw from the skill and perks of it's original state, so if you have a 2h weapon and are using it as a 1h you still use the 2h skill and perks!
Also since it uses light weight scripts it works with any weapon from any mod! So no patches should be needed.
Been waiting for this for so long