I never did the color icons myself, but I did download them to see what they looked like. I had to use WinRAR to unzip them as Vista's built in zip utility claimed the archive was corrupt. Try using WinRAR or some other application (maybe 7-zip freeware) to extract the zip file on your PC. Once you get that done, you can simply copy and paste from your PC to your \htchome directory via activesync.

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Treo 600 -> Treo 650 -> Treo 700p -Treo 700wx -> Mogul -> Touch Pro
-You may like to flash, but your phone shouldn't LED Killer
- It's Totally Tabular - HTC 5 & 6-Tab Home Plugins