Somebody
Try a work around for mirror mode, not perfect but i hope you can solve it with my help.
Every sprite which is in this program you have to mirror and save it in a mirror library and syncronize it with the original one.
Orgin point is not in the mirror (One black point you can see on this follow picture).
Its like set rotation, position and size (everything mirror from the middle). I guess you could reach these with C2.
Two layers one is above and overlap the other one (half side), so you can get a "perfect mirror"
[attachment=0:20kebhzm][/attachment:20kebhzm]