You could try changing the folder name, OGP, into something random. It seems the simulator won't find the client if you rename the folder.
When you try to use the simulator, a file open window should appear and just go to the renamed folder until you see the LT Launcher and select open. It should work then.
I don't know if it might screw up your gameplay when you change the folder name back to OGP. I seem to do fine but it could be just me.
Alright, I found a kLT installer but it isnt recent [June '10] and I came across a problem.
One, since it isn't recent, I tried running kLT and letting it update but it just gives me an error code half way. Is there any other way getting this to update or do I have to be patient and get someone to upload a recent one?