is there any possible ways that i can put a shadows for my entities w/o using shadow_stencil?
because when the shadow_stencil is ON my frame rates really drops down,can it be fixed??

Check the on-line manual for the lighting engine.
There now seems to be a lot of new entity lighting options.
I cant help more, Im a lighting newbie still wrapping my brain
around the OLD lighting engine, before I move on the the new
(and much better looking) one.

The thing about the new lighting engine is that some old shadow effects are gone.
The new ones are completely useless to me too because of very bad fps.

You do have more options now but the basic shadows that only fake a "real" shadow just don't look nice.
Everything above drops my fps down to 10-20.

hmmm,then how do i fake my shadows?

try use shaders