Making your own Picture Tubes for Paint Shop Pro is not really difficult, though it requires some precision. Of course you already have the images you want to use for the tube!

I start by opening the images I'll use:

I was lucky, because none of the images had a background I had to get rid of... If they are in a background, or part of a larger image, you'll need to select the desired part by using the lasso tool, cutting, and pasting as a new image with a transparent background.

If necessary I resize the images that are larger than I want them for the tube, untill they all have about the same sizes. These (in this case) six images will have to be pasted into a new image, so now you'll need to calculate the desired size of that new image. The way I do it is, to multiply the greatest height and the greatest width by three, which gives the size of the new image. Choose transparent for the background color!

If this new image is large enough to easily accomodate the six pictures, or if they're exactly the same size or if there will be only one image in the tube, I sometimes omit the next step:
go to Menu > Preferences > General Preferences, and make the grid the size of one-third of your new image. Then go to view > Grid and you will have an aid for positioning the parts of the new tube.

Now with the magic wand click somewhere in the background of the first dog. Part of the background will be selected.
Go Menu > Selections > Modify > Select similar, and all of the background will be selected.
Go selections > Invert and only the part you need will be selected. Do Ctrl-C or Menu > Copy, then activate the Tube-to-be, and go Menu > Paste > as new selection. The result is below: you can still move the selection to get it on the right spot.

Repeat the same actions to place the other images in your tube:

If you're satisfied, go to Menu > Export > As Picture Tube

You'll get a window to define the data for the tube:

In 'cells across' and 'cells down' you define the horizontal and vertical number of images in your tube, and you give it a name to go with it. I usually don't bother with the Placement options, since they can be changed every time you will use the tube.

If you press OK now, the tube will be saved as a '.TUB' file in the tubes directory, and next time you'll need a dog you will find it in the list.

PSP5 will add the data for each tube to a file 'tubes.ctl' in your tubes folder.
PSP6 will save the data for each tube in the tubefile itself.

For this short tutorial there's no difference between PSP 5 or 6.