I had no problems working with a bass player in arranger mode...make sure you agree on the arrangements, turn off the bass channel in your style, and, most importantly, make sure he has a very good monitor.

I also have often worked with a guitarist successfully, using the same procedure, but making sure the appropriate style part is switched off...if he is doing primarily lead guitar, it is possible to leave one of the Guitar Chord tracks on. Experiment.

Before doing anything, make sure they can play to the arranger's strict tempo...some bass/guitar players, even very good ones, may need time and practice to get used to playing with a strict steady tempo drum track, and some never do get used to it.

In both my cases, we used charts, which made it much easier.

Ian