I have never actually tried it that way... But the one time I made mouse map changes, it screwed everything else out. So I am assuming it would no longer scroll for roster...... Assuming is very, very bad. If you try it, let me know?
Really? It doesn't seem to interfere, being mapped as the throttle. May be because of modes I guess.
And even if it did..... Now that I think about it, I usually grab the scroller with the pointer and click it up and down.