Two players goes all-in on flop, should I call?

[Gurravasa]

SB has been pretty agressive at the table and BB has been a big looser calling way to light.

First is this an ok hand to raise preflop or should I limp? Should I fold when the bad smallstacked player raises the pot preflop?

How should I think on the flop? I can't fold this right? I have a OESD and the nutdraw to the low hand. An 8 should give me the high and low nuts right?

Prima Poker skin
Pot Limit Omaha Hi/Lo Ring game
Blinds: $0.50/$1
4 players
Converter

Stack sizes:
UTG: $55.09
Hero: $165.34
SB: $72.66
BB: $32.26

Pre-flop: (4 players) Hero is Button with 7[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/club.gif[/img]
UTG calls, <font color="#cc0000">Hero raises to $4.5</font>, SB calls, <font color="#cc0000">BB raises to $18</font>, UTG folds, Hero calls, SB calls.

Flop: 5[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/spade.gif[/img] ($57, 3 players)
<font color="#cc0000">SB is all-in $54.16</font>, <font color="#cc0000">BB calls all-in $14.26</font>, Hero ??