I figure since there is a majority drum guys here that someone can help me out. I have gotten as far as highlighting all the accented notes, but clicking on the grace not only gives me the option to add it to a single note and not apply to all that are highlighted. I'm sure there is simple fix or something small i am doing wrong so any help is appreciated very much. Thank you

I'm not sure that's possible in Sibelius. Then again, I'm not sure some of those grace notes would be possible by humans either. ;) In such cases, it might be best to add them on a per-note basis.

okay thank you very much!

Agreed!
even though we do live and breath to play flams��_��_

(: