Plugging your guitar directly into a sound card isn't likely. Plugging it into a something that has a 'Line Out' (and connecting that to the sound card) is much more likely. Most amps, effects boxes, etc. will have this.

I don't think any earlier versions could have 'enabled' this since it is a function of the sound card, not the software. BiaB uses your installed soundcard, if your soundcard supports it, then BiaB will .. but it isn't a BiaB feature/function to my knowledge.

I do not work here, but the benefits are still awesome
Make your sound your own!