Download and execute
Current stage of development: Beta V2 Release candidate
Download here (NOTE: I've noticed chrome can be an ass and complain about this download. Tell it to keep the file and scan it yourself - it's safe. Chrome can be paranoid when a file is not 'popular' enough... chrome is a jerk).
To use: Extract the zip somewhere then run ovemu.exe. More detailed instructions are located in the program itself under the 'Reference' menu. This will only run on Windows 7 and above as it was written with the .net 4.5 framework. Speaking of which, you may also need the .net framework. Get that here if you don't already have it.