Raise or fold 99 to steal???

[Steverino2]

5+1 SNG at Pacific

5 players left I have t600 limper has t500 raiser has t3000-blinds @ 15/30

One limper--button (big stack) raises to 100--I have 99 in BB--elect to call--my plan is to go all in with any decent flop--limper just calls

flop is J 8 7 rainbow--about as good as I can hope for--I go all in--limper calls w/ KJ - raiser folds and I go out when I don't improve

1. Is this a raise or fold situation with the limper still to act preflop/? If so should I go all in here??

2. What if it's just me vs the LP raiser??--I played it the way I did because I felt the big stack would call my all in-- playing it the way I did would maximize my
chance to win while letting me get away from my hand if with a scary flop