Welcome to the bitshares community m200,
the web wallet @wallet.bitshares.org is not capable of importing private keys ... unfortunatelly, neither is the (rather new) mobile wallet released by Elmato (yet) ..
The only client that is currently capable of importing a private key is the core bitshares client available at the webpage ..
I understand you frustration when it comes to syncing with the blockchain .. rest assured that the devs are currently working hard to make bitshares 2.0 A LOT more robust and less resource hungry ..
Sorry for the inconvenience ..