I use psxfin.
http://psxemulator.gazaxian.com/
Thanks for reminding me, I need to upgrade to 1.13.
Let me tell you now that emulators and I don't mix well, but I've barely had a problem getting this one to work. There were some really good pictorial 'how to start up a game for dummies' style posts on the forums too.
The emu is fantastic for both PAL and NTSC games.