Customizable home screen docks are one of the benefits of using third-party launchers and custom themes/ROMs, but how can you get a user-defined dock if you're still using HTC Sense on your EVO?
With JsChiSurf's Remap Rosie mod, of course! By flashing one of his .zips (tutorial here) on your rooted HTC EVO, you should be able to replace the stock dock with a variety of other docks (examples shown above right) without parting ways with Sense. The docks are based on the Fresh 184.108.40.206 Espresso ROM, so the only thing you'll have to say goodbye to is the black dome and stock mappings.
All of the Espresso docks remap the center button to the app drawer, which means your choices are limited to what's on the right and left sides. There's already a nice selection of preset options to choose from at the link below and JsChiSurf seems open to custom combinations too, so there's a good chance you'll be able to get whatever you want.
Note: As with many mods, this is not guaranteed to work on all custom ROMs. Always do a Nandroid backup (tutorial here) before flashing.