First of all note that the description says "When you ready an action, you prepare to react to a CREATURE's action or an EVENT."
Page 291 does not change my interpretation in the least.
1. Choose the action you are readying. No problem there.
On the same page so far...
2. Choose trigger. The fighter isn't choosing the trigger, the Warlord triggers it as an additional effect of his attack.
Huh? The fighter is the only one who CAN choose the trigger for HIS action. He may just choose what the Warlord tells him to, but it's still the fighter who must declare the trigger, target and action that he's readying when he uses his standard action to Ready an action. The Warlords attack may BE the trigger the fighter plans to act on, but the fighter can still change his mind and choose not to act.
3. Immediate reaction. It takes place AFTER a trigger condition is met.
All kosher here.
4. It also deals with reactions to enemy actions, specifically unfriendly move actions on the part of an enemy. It's essentially an ambush tactic. It happens before that enemy's attack but after the move.
Still onboard, but it's worth noting that this section starts with "If you want to (do this), you should (do that)." It's basicly a helper section for a particular cirumstance and desired outcome and details how you might use a readied action to act within another creatures POWER (after the movement and before the attack of A POWER). Acting within another creatures TURN sequence should be peanuts after that clarification.
5. Under Reset Initiative it is also pertaining to an ENEMY whose attacks you went BEFORE, not after.
Huh? You just said that your attack was after theirs. (see point 3)
What it SAYS is, "After you resolve your readied action..." which you already stated...
... takes place AFTER a trigger condition is met.
then you reset your initiative to a place before the trigger.
"ENEMY" does not exist in this section, does it? ("NO SENSEI!")
Then you "move your place in the initiative order to DIRECTLY before the CREATURE or EVENT that triggered..." This wording is consistent with the beginning description and the example in the DMG.
6. Again, this section only deals with reactions to enemies, not as part of allied powers.
Where does it say that?!?
Please point out to me in the text where the implication comes from that this is only allowed for enemy actions, because it certainly isn't there explicitly.