Is the option in the Image menu that says "Add Borders" not what you are looking for? If not, can you explain what you want in more detail?

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Ignorance is not necessarily Bliss, case in point:
Unknown has caused an Unknown Error on Unknown and must be shutdown to prevent damage to Unknown.

How do you tile graphic across in the white part of a photo edge frame??

Using the Magic Wand select the area you wish to fill.

Click on the Foreground Color box in the Materials Palette, and Click on the Pattern tab. From the drop down, you can select a pattern or graphic. If your graphic is in another file, you can open the file before you do this, and it will appear in the drop down, as a selectable pattern.

You can set the angle and the scale for the graphic. and then using the Flood Fill tool (paint bucket) click on the selected area to fill it with the pattern.

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Ignorance is not necessarily Bliss, case in point:
Unknown has caused an Unknown Error on Unknown and must be shutdown to prevent damage to Unknown.

I am in the process of scanning old slides and negatives to TIF files.  Unfortunately, I have a number of vertically formatted images.  I do not want to lose any detail and render the vertical pictures as 4 x 6 horizontals so the prints will fit into photo albums with standard horizontal 4 x 6 sleeves.   To describe this as simply as I can, I need to rotate the vertical images 90 degrees (landscape not portrait orientation without cropping) and add as much black on the right and left to make a final 4x6 print with the original image undistorted.  I would like a simple solution if possible.

I see from your answer to another forum user with a similar question that you suggested copying and pasting the image into  another file and then painting the borders.  I have tried saving as a JPG and pasting into a new image, but I am doing something wrong because the JPG ends up being a small cropped portion of the original image rendered as 4x6.  I tried the same thing with a BMP copy as well and could not extend the right and left borders beyond the original image frame.

I have dozens if not hundreds of verticals to deal with, and I am truly stuck.  These are negatives of my wife and me and our three boys when the boys were toddlers and digital cameras didn't exist back then.  My intent is to make albums for everybody now that our boys are recently off and on their own.

I am using Paint Shop Pro 8.1

THANKS in advance for your help on this.  

Can you use PSP's Rotation tool from the Image menu, to rotate the image?

As for getting cropped, it might be that the scanned image is too large to fit in a 4 by 6 box.

When you scan an image they are no longer constrained by their  real life size. So an image that is say 2 by 3 inches, can be scanned in and be huge if the scanning software is set to scan it that way.   

For conventions sake, a 6 by 4 image is about 1200 by 800 pixels. How large are your scanned in files?  I suspect they are scanned at high resolution so their actual in_computer dimensions are much higher than 1200 by 800 pixels.

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Ignorance is not necessarily Bliss, case in point:
Unknown has caused an Unknown Error on Unknown and must be shutdown to prevent damage to Unknown.

I have been experimenting with all kinds of variables for several hours already this morning.  It seems that all I have to do is rotate the TIF 90 degrees, use the cropping tool to get the image I want, add borders and save as a final JPG.  I have rendered all my verticals this way, but I am not sure whether my 4x6 aspect ratio is correct.  I plan on going to the digital photo developer in the next few hours and will see whether I have succeeded.

Thanks for your help.