Not all PC-DVD drives can read discs from other regions. Some have no region encoding built in, some have un-flashable region 1 firmware, and others have allow you to flash the firmware to make it regionless. Even if your drive is regionless, or you flashed the firmware, you will still run into the Windows built in region protection, but you can get a program called Region Killer at
www.divx-digest.com and it will cancel windows region protection. You can get some fairly cheap region free pal/ntsc dvd players at ww.j-list.com.
I hope this answers your questions. Let me know if you need help.