I’m a winPenPack.com developer.
winPenPack (sourceforge.net/projects/winpenpack) is a collection of open source portable programs, optimized for use with a USB pen drive or any portable device and also directly from Hard Disk.
I’d like to signal you that we have developed a portable version of Mixxx for Windows, called X-Mixxx, in winPenPack.com Format: winpenpack.com/main/download.php?view.828 . You have just to download the .zip archive, uncompress it and double-click on X-Mixxx.exe
Obviously, any suggestion or feedback will be welcome!