As Wasteland Half-Life was released prior to Steam's existence, no Steam patch ever existed for the mod. So... here we are! My personal patch for Wasteland Half-Life to make it look more like it supports Steam Half-Life.
Two different flavors of the patch are available in this download, and they are 1.0 style vs. 2.0 / 2.1 style! Just extract the desired zip directly into your Steam Wasteland Half-Life directory (usually .../steamapps/common/Half-Life/wasteland/) and play! Making a backup of your existing liblist.gam file in the mod directory is also a good practice, just in case.
wasteland_patch1.zip is the 1.0 style of the menu UI and background.
wasteland_patch2.zip is the 2.0 / 2.1 beta style of the menu UI and background.
Edit: I packaged the two zips a bit incorrectly, and did not include the liblist.gam file that's required to show the Steam library icons! Doh! Fixed that now!