Hello exilea.

I don'y have Poser 7.  I only upgraded from 4 to 5 when Content Paradise was giving it away.  One trick I used to use with Poser 4, and still works with Poser 5 is to put gaps between poses.  The following example would be if I had a 15 frame walk.

In the first frame, I would pose the character standing.

In the 5th frame, I would start the pose for walking, which would go from frame 5 to 19. 

Next I would make small adjustments to frame 2, 3, and 4

If it messed up my walk, I would apply the walk pose at frame 5 again.

Then I would pose the character standing at 24.

I could then tweek frames 20, 21, 22, and 23.

Then I would repose 24 again, just to make sure it was still correct.

I'm not an artist, just a PC junkie who loves to play with 3D toys.

Please let me know if this helps, so I will know if I should tell others, or keep my mouth shut.

           -David