How to use multiple mvcs together

Thanks InsiteFX

I already use MY_Model the way you describe. Still my approach messes up my controller and views. It like 
I have to have double methods in one controller, like edit_article() and edit_store(). 

If I like to separate also them, my aproach is solving it.  But still I have to pass the returnpath back  and forth. Form opne accepts hiddn fields so Isend them there.

I think I will try my concept and then evaluate. Maybe I willl try HMVC but right now I don't have the CI experience to do it.

What do you think, would HMVC be better than switching to the other MVC, doing the work over there, and when that is finished redirect back using the returnpath?