My system consist of: one PC + one projector + one hard screen.
I need to project two different videos in the same screen, besides, to add
subtitles or messages in the lower band of the screen, that is, to get
partition of the screen into multiple boxes to get my objective.

Do Somebody knows a software with which I can do that? It doesn´t matter if
it´s free or payed.
Generally I don´t need to edit videos, because I will project movies or
videos saved in a DVD recorder from the commercial TV.

Thanks for your help.