hrmmm.. 1.9V is the highest i've ever ventured with my 533A. Personally i wouldn't go any higher especially without more adaquate cooling. If your chip requires 1.9 to hit 100fsb you'll never reach 133. A fsb of 133 would be a processor speed of 1197 and that is near the limit of the coppermine core. I suggest moving a little slower. I would get a new hsf and apply some paste. That *should* allow you to drop the voltage and may even let you increase the speed some more.
About your temp, is the processor under a load when you get this temp? or is it idle?
If under load your its fine but could be improved upon if not and it idles at 41C then you should no doubt look into some better cooling before resuming.