Run Command Most Recently Used List Storage

At least for Windows XP, this list is stored in the registry:

My Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\RunMRU

It looks like there are values \a through \z off of RunMRU, plus \(Default) and \MRUList. There is string value in MRUList: e.g., "nkvlsawbhczeyoijfugrtdxpmq", which determines the ordering of MRUList entries.