The fact is that I updated the no$zoomer just a while after I created this thread, along with deleting the files in the emulator directory, downloading it again along with my own bios and firmware files, and it seens the game is not freezing anymore. (that's why I had to edit the post)
Anyway, I'll post the system specs should this problem comes again... maybe you guys know a solution for it:
Intel Core 2 Duo 1.8Ghz
Intel MB with intel chipset (I don't recall it's model right now)
2GB RAM DDR2
HD Samsung SATA 2 320GB
No offboard graphics or sound cards installed
That's it... as for the mic and realtime auto, I didn't messed in then, but I will try should this problem persists.