Playing 99/TT to passive?

I have a hard time playing 99/TT. When they don't improve and I have a lot of opponents and high cards on the flop it's an easy fold. I have however a harder time to play them when the flop is 'good', but when there are also a lot of opponents, since i figure they have together a lot of outs against me and they are not going to fold a lot of hands on a flop like this (for a single bet). If someone bets in front of me I would raise.

Example 1:

Party Poker 0.50/1 Hold'em (9 handed) FTR converter on zerodivide.cx

Preflop: Hero is MP1 with 9[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, Hero calls, MP2 calls, MP3 calls, <font color="#666666">1 fold</font>, Button calls, <font color="#666666">1 fold</font>, BB checks.

Flop: (6.50 SB) 6[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(6 players)</font>
BB checks, UTG+1 checks, Hero checks, MP2 checks, MP3 checks, Button checks.

Turn: (3.25 BB) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(6 players)</font>
<font color="#CC3333">BB bets</font>, UTG+1 folds, <font color="#CC3333">Hero raises</font>, MP2 calls, MP3 folds, Button folds, BB calls.

River: (9.25 BB) 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, MP2 folds, BB calls.

Final Pot: 11.25 BB

Example 2:

Party Poker 0.50/1 Hold'em (8 handed) FTR converter on zerodivide.cx

Preflop: Hero is CO with T[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/diamond.gif[/img].
UTG calls, UTG+1 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">MP2 raises</font>, Hero calls, Button calls, <font color="#666666">1 fold</font>, BB calls, UTG calls, UTG+1 calls.

Flop: (12.50 SB) 6[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(6 players)</font>
BB checks, UTG checks, UTG+1 checks, MP2 checks, Hero checks, Button checks.

Turn: (6.25 BB) 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(6 players)</font>
BB checks, <font color="#CC3333">UTG bets</font>, UTG+1 calls, MP2 folds, <font color="#CC3333">Hero raises</font>, Button calls, BB folds, UTG calls, UTG+1 calls.

River: (14.25 BB) J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
UTG checks, UTG+1 checks, Hero checks, Button checks.

Final Pot: 14.25 BB

Should I have bet/raised pre flop?
Should I have bet the flop?
Should I have bet the river in example 2?