A question of continuing after Questionable Limp

[poreska]

Hi all,

So I'm taking the plunge, and trying to graduate from lurker to poster-of-hands-played-badly. Hopefully with a view to one day being a poster-of-hands-played-less-badly. Here goes;

BB in this hand is LPA, 40/7/2, so I figure him to take a stab at a lot of hands, especially when no-one shows any strength.

Full Tilt Poker, $0.25/$0.50 Limit Hold'em Cash Game, 9 Players
LegoPoker.com - Hand History Converter

Pre-Flop: A[img]/images/graemlins/diamond.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] dealt to Hero (MP1)
UTG calls, 2 folds, Hero calls, 3 folds, SB calls, BB checks

As soon as I hit call, I cursed myself - I've been trying to limp less, especially from early position as I only get myself in trouble...

Flop: (4 SB) 9[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/club.gif[/img] (4 Players)
SB checks, <font color="red">BB bets</font>, Hero??

So I have a GS to the orphan end of a straight, BDNFD and 5SB in the pot. The Stove thinks I have 45% equity against a VPIP of 40 - if I have that right, then I can peel here, right?