TamiyaUSA.com features wallpapers that will display properly with most standard color palettes and screen resolutions so you shouldn't have to change your display settings. However - if the wallpaper does not look its best (bland colors, too small on the screen, etc.), check the following:
Colors: All wallpapers (unless noted) are full color. If you are running Windows 95 and see sudden color changes, then your color palette may be set to 256 colors. To check your color palette settings, go to 'Settings' (in Start Button) -> 'Control Panel' -> 'Display' and then click the 'Settings' tab to change the color palette to 'High Color' (16-bit).
Sizing: All TamiyaUSA.com wallpapers are designed for optimal display at a screen resolution of 800 x 600 pixels and 1024 x 768. To check your screen resolution settings, go to 'Settings' (in Start Button) -> 'Control Panel' -> 'Display' and then click the 'Settings' tab to adjust your screen resolution.