does anyone know how to put the vertical stableizer from eflite on the blade?

I cut my own out of some flat thin modeling plastic but the photo on it looks similar, I personally used small dabs of CA glue to affix it to the tail boom and tail rod, though ive read other guys using clear tape.

would you happen to have pics of that?

sure but i dont know how to put it in a message so its in my gallery, sorry..

Use clear tape. Thats the way Esky does it from the factory.

does the vertical Stabilizer help that much while flying

it helps only in forward flight, and in a hover the in wind may be more apt to get pushed around more than without one.