reload form after save

[eluser]al404[/eluser]
sorry but i can't really understand wich is the cleaner way to do this

from what i read here
http://ellislab.com/forums/viewthread/47642/

it seem that it is not possible to pass data from controller to model

so if i have a model that load data i can't then pass them to an other model to create the form (populated with values)