I use RB for live playing but as a point of reference look at my computer specs in my signature.
I could not use BIAB to play live with this computer with the new engine and the +/- files being deleted.With "fast generation" checked playback is VERY unreliable. With it checked I'd drink too much beer while the song generates.My point is if you have a lappy and it's specs are not considerably better then mine be very careful playing live.
One option though is to freeze all your songs.


John
ESI Gigaport HD+
Lenovo Turion II /4 Gig Ram/ Win7x64 be
15.6" Monitor
"The only Band is a Real Band"
www.wintertexaninfo.com/BANDS/JohnnyD.php