> So, I have a 5-button mouse with a scroll wheel.  If I tell X that there's
> 3 buttons and a scroll wheel, the scroll wheel can be mapped to buttons 4 and
> 5, and everything works.  If I tell it there's 5 buttons and a scroll wheel,
> the wheel gets mapped to buttons 6 and 7.  Thus, for instance, xev shows it as
> clicks on buttons 6 and 7... but mozilla still uses buttons 4 and 5 for
> scrolling, which is confusing.
> 
xmodmap works in XFree86 on FreeBSD can't see any reason why it would work in 
NetBSD as well. 

Try:
xmodmap -e 'pointer = 1 2 3 6 7 4 5' 


Mike