Th only difference is not to press the solo button on a track, but to select the track by pressing on the track number in the track pane, so it turns blue. Then, when you export (as detailed above), it will only export that track, but through the master bus.
Sadly, the only time saving will be that you won't have to unsolo that track, and then solo the next track, you can just select the next track.
Not much, I know, but I thinks these may be the only options. Sorry.