Hello all. I am doing Tyranids right now, because I waited the last 2 years till the new codex came out before I started them. I need more Tyranids but my wife will not let me.

. She says I have all these
SM and Orks not put together so I can't have any more. So I had this idea, why not use my Orks for Tyarnids, and call them either Orknids, or Tyranorks. So I will be making my Orks and put on some left over Tyranid arms and put some clay tails and stick them on.
So when I am not using my Orks as Tyranorks, and want to use them as Orks, how should I make them? So I will put them together and glue all the gun or axes or what ever they have and then
tac on the arms and tails.
I have the Ork battleforce box and Blackreach. So with that, what kind of Ork army can I make? Would that be enough for a 2010 point game? How do I make the Ork motorcyles? Is there only one way, or should I make it a certian way? What about the Trukk? I only know a bit about Dark Angels and Tyranids. When I read the Ork codex, I am lost. I don't know how to start it, so I thought I would ask here.
I am not really asking for a true army, but where to start, so I can then use the Orks as Tyranorks for now, and then when everthing is built I can buy more stuff. I am afraid when I make the Orks, and once I take off the Tyranid arms and tails, I have assembled the Orks wrong.
So any help would be greatly appreciated. If I have enough for a 2010 point army, maybe I will use that since I will not have to use counts as, unless I use the Blackreach Dreadnaught and convert that in some Orkiness fun. So any ideas you can give me will be greatly appreciated.