Using wifi and cable at the same time (Selective functions)

I'm using Win7 Ultimate 64bit, connected to a D-Link DIR615.
I have several wireless devices connecting to the computer (printer, tablet, phone etc.), so I need the wireless connection active on the computer.
But I want to connect to the internet directly via cable to get a faster, stable connection.
I'd also like to be able to connect my boxee box and other wired devices via cable.

At the moment, when I activate my wireless network connection in my networks settings, it seems like it also uses that connection for Internet and boxee box. So I have to disable the wifi- connection (and block my other devices from accessing my local files) to use the wired connection to internet.

Is there a way to configure it so that it uses wired connections for internet (and selected devices like the boxee box) and only use wireless to those devices that need it (printer, phone, tablet)?

YOU can only use one or the other im pretty sure . without connecting all via wireless or wired I think your going to struggle sorry.

Yeah, seems so. I've been searching for a while and haven't come up with any solutions.