Jeyl said:

I still don't know how you are going to have the Klingons from the opening attack the Enterprise. What reaction shots from the Enterprise are you going to use? Will there be dialogue somehow from the characters? This is the biggest draw for me in regards to this edit because even I can't think of a way of doing it.

I think we're all eager to see how this will be done. I imagine something like this:

EDIT: REDONE

Shortly after the Enterprise sees the communications relay destroyed, they find themselves face-to-face with the V'ger cloud.

They try friendship messages, and Decker tells Kirk about the alternatives.

As we see the icon of the Enterprise headed towards the cloud on the viewscreen, we see Klingon icons appear there, as a voice from another movie says "Klingons!"

[Spock's part about puzzlement from V'ger is cut]

Kirk and Spock look at each other. "Force fields up full. Deflectors, now."

The viewscreen shows V'ger on one side, with Klingons on the other.

New shots show Klingons firing on the E from behind, damaging it and injuring Chekov and the Warp Engine. V'ger fires upon the aggressors first, disintegrating them.

Spock realizes that V'ger is communicating in the million Mhz range, and tries to communicate back as the only shot V'ger needs to destroy them approaches.

This is something I just came up with while scanning the movie. I think it explains why Kirk and Spock are so eager to raise shields now after they spent time arguing with Decker about leaving them down, instead of them knowing that V'ger is puzzled and assuming that means they're going to be blasted.

Replacing the first attack by V'ger with it being damage from the Klingons would solve the problem I have with the E taking a direct hit from V'ger and surviving for a second shot, while the equally powerful Klingon ships disintegrate on impact (I would assume they have their shields raised all of the time).