Can't find 'Simobjects' Folder.

Hi,
I'm trying to install a new aircraft onto flight simulator X. I have got it onto a temperery folder, and unzipped it, but I can't find the simobjects folder thet the aircraft file is meant to be in.
Any help would be greatly appreciated.
Thanks
I'm trying to install a new aircraft onto flight simulator X. I have got it onto a temperery folder, and unzipped it, but I can't find the simobjects folder thet the aircraft file is meant to be in.

Any help would be greatly appreciated.

Thanks