Hi. This is my scenario:
I have a bunch of stems (bass, lead guitar, rhythm guitar) and I want to import these into BiaB so that I can convert these to Realtracks. But after spending some 5 hours today trying to figure this out, I am no closer to a solution. There are a lot of instructional videos on the web, but I haven't been able to find anything which explains how to do this.

Could someone give me a step-by-step workflow?

I have both the WAV and the MIDI stems, if that's a help?

Duncan