This program is awesome and it would have been the first thing I used if I knew about it when I first started out mining.
I'm having some trouble connecting to this pool :
http://nrb.miners-united.com/news for Noirbits. I use the same settings in GUIminer Scrypt and it works. But Multiminer attempts to connect for a few minutes and then produces the error message "Configuration for noirbits disabled - all pools down."
I had the same problem with
http://nrb.miners-united.com. I suggest you register and add
http://noir.minepool.net:3345 as a backup in Multiminer. That's what i did and my problem is solved.
Did you actually mine Noirbits? I was solo mining a bit, and got 1000 Noirbits, but the calculator on coinchoose was quite incorrect, and when I realized it, I went back to mining LTC. The issue with putting too many obscure coins in the auto-switching, is many times Coinchoose is not right.