If you open the animation palette at the top will be LaFemme (Default scene) and next to LaFemme is a sideways carat that will open up and show more sub-parts. What you want to do is click the carat so that only the name of the figure is showing. Start at frame 1 click and hold the left mouse button and move to frame 24 and release the button. At this point the 24 frames should be highlighted. Press Crtl + C to copy that range and place the cursor on frame 25 and then press Crtl+v which will copy and paste the movement so that it is now 48 frames long. Repeat. This of course assumes that you have the movement already in the first 24 frames.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13