The first theme I downloaded, after installing Xoops, was the Gold theme from http://www.xoops-themes.com. ArchSilver is based on that theme. The theme was originally a PHPNuke theme from http://www.Disipal.net, BlackW, that I modified into ArchBlackW. I converted the modified ArchBlackW into the Xoops theme ArchSilver. It is a dark theme and has a Black/Gray/Silver color scheme. The them has turned out , IMHO, ten fold better than my modified Nuke theme. Screen shot NO REG REQUIRED FOR DOWNLOAD
Please test on your site and if any problems occur, document the version of xoops, browser and OS versions. Once testing is done I shall add some bells and whistles.
All that I ask is that you leave the footer credits intact. If you modify the theme add your credits in the footer.