I recently ran across the POWERDVD Windows 2000/XP region set discussion. I know it is an old topic, but I am interested in it because it is exactly the type of information I need for Windows XP service pack 3. The information in this discussion is almost what I need except for the registry location of the windows region code data. The sub key mentioned does not exist in my registry. I am using powerdvd version 3(I know it is old,but so am I and it functions perfectly). This information is not for need, just for knowledge. I have tried other sources and all of them first try to get me to use some software, but I do not need any more. Due to the fact that my DVD drive is a liteon, I can use the LTNRPC utility to modify the firmware of this drive. I can change regions and modify the change counts and disable/enable the rpc of the drive. I am currently using POWERDVD to play my DVD's. I have DVD Genie, which under the XP environment will allow me to change the region code and region count of the Powerdvd player. This only works if the drive is in RPC1 mode. I also have the NERO INFOTOOL which will give me the RPC status, region code, and region code counter of the DVD Drive. I also have ANYDVD which to my understanding allows me play region 2 DVD's(I am in region 1) by temporarily modifying the dvd disc region(how I do not know) to match my current code of 1(among other things). All of these software thing work just as they are suppose to. Since my powerdvd appears to always use its own internal region code, I have never had the need to modify the windows system region code. In the future, I may have to. That is the reason for my question. What is the location of the registry entry or entries under Windows XP service pack 3 for the windows region value and region count value? NO it is not the defaultdvdregion entry. That is used for initial setting of the drive. Hope someone can help.