The easiest way to get round this is to get software such as anydvd (or dvd genie) for about Â£20 which fools the PC into thinking your drive is region free. These are the safest way as they do not flash the drives
Alternatively you may be able to set you drive to region free by reflashing it. Visits the Dangerous Brother website (http://tdb.rpc1.org/). This is a more permanent solution but caution is required - be sure you know what you are doing.