I found 1 problem.. but still it doesn't work..
regsvr32 "c:\program files\Messenger Plus!\Plugins\ss.dll"
change it to
regsvr32 "c:\Program Files\Messenger Plus! 2\Plugins\ss.dll"
It still doesn't work.. but that's at least 1 problem you should change, The commands doesn't work.. I hope you fix it.. it should be hendy
A suggestion is to add the commands in the readme.txt and change the registername of the plugin to ScreenShotSaver.ss or smth