Most of the files are install-friendly...example *wba for WindowBlinds, *dxpack for DesktopX objects, *bootskin for BootSkins, etc. Clicking on a file with this app-specific extension will put it in the correct directory for you. The only ones you will have to extract in the correct directory yourself are *zip files. Generally all that you need to do with these is go to the directory where the app itself is installed and usually the folders within (backgrounds, themes, objects, etc.) will make enough sense as to where to extract the *zip you've downloaded. If not, we be most happy to answer any questions you may have

Wallpapers can actually go anywere you please. It's really up to the individual's preference. Some folks place them in the Windows folders, some in Windows\Web\Wallpaper, some in the My Pictures folder. I have them in various folders, depending on what type of wall it is. It's totally up to you.

You can also attach any wallpaper to any wb skin so that the wall will load with the skin.

You can also attach any wallpaper to any wb skin so that the wall will load with the skin.

Must be a bmp, or WindowBlinds won't see it.

Do they need to be jpg or bmp?

Depends on how you want to apply them.

If you want them to load with WB skins, yes they must be saved as bmp. To upload as wallpapers here, I would keep them as jpg, because of file size.  Sizes.... we prefer a minimum res of 1024x768. You can also try resizing them up to 1280x1024, 1600x1200, and include those in the zip as well.

How do I resize without losing picture quality?

Which graphics program will you be using? If you're using PSP I can help, but whatever you use, there should be info in the Help files.

How do I zip the multiple files?

I don't use WinZip, or ObjectZip, but most zip programs are somewhat similar..... again, try the help files. If you still have questions, ask.

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I use PSP myself. But, the trial versions may not allow you to do certain things. If you open a jpg file, never save it as a jpg. You will lose quality with most programs including PSP.

How do I resize without losing picture quality?

Basically, you can't resize without losing some quality. You can save the image as a bmp using paint(save as), and use the option to stretch the walls in display properties. This way you don't have to alter the original picture.

If you want to improve the quality, you can try the options to sharpen the image in PSP.

How do I zip the multiple files?

With Winzip, you can select the multiple files by clicking one and holding the ctrl key down and select another. You can select all the files by clicking one and then holding the shift key down and click the last one.

Once your files are selected, then right click on one of the selected files and choose "add to zip".
A dialog will appear and you will need to pick a name for your zip and a location of where you want it to go.

Also, if I wanted to upload them for consideration as wallpapers for others to use

Note: These must be wallpapers that you created yourself. To upload another artists work is a copyright violation unless you have written permission text, which you will need to include with the zip. Personal photos are your creation and no permission is needed. As Koasati said, they must be in jpg form. But, try to find a program where you won't lose quality.

Thanks to both of you. The photos are my own and I already knew about getting written permission about using someone else's work. Which is what I will have to do if I use any graphics because I'm not much of an artist.