A slide Show is simply a mocie with a slow frame rate, if the frames are to be different sizes they must be loaded using Import Frame. Frames can be positioned manually using the Shifted Arrow Keys, or semiautomatically using Points, P1 and P3 are set, point 3 is then made to coinside with point 1 by pressing the Set and Use Parameters button on the points dialog. Once the frames are in position Make Movie is invoked.
First create a large blank picture that is large enough to contain all of the slides, then load it into CombineZM using File Menu->New
Now position point 1 as near to the centre of this picture as you can by pressing '1' while the mouse pointer is over the desired spot.
Next File Menu->Import Frame and load a slide, position the mouse pointer over the center of this picture and press '3' then click on 'Set and Use Parameters' on the dialog that appears and the newly loaded picture should move to the centre of it's frame, you can use the shifted arrow keys to fine tune it's position.
Repeat the last step for each slide to include.
Draw a box that is large enough to contain all slides, use the Up and Down arrow keys to check they all fit in the box, adjust their positions and the box size/position as necessary by redrawing it.
Now goto, and click on, Movie Menu->Make and set the parameters appropriately, and you slide show sill be made. If you require a format other than .wmv use Movie Menu->Export Movie Frames instead and use a different program to create the movie file.
Notice the Copyright notice was added to the frames of this movie after they were loaded and centred using a macro and then the movie made.