This method doesn't require root.
Use WiFi to access app store. Download ADW Launcher Free because it will get rid of the stock HTC Sense phone and drawer options and replace it with a Dock bar. Then go to ADW settings - UI settings - Main Dock - Main Dock Style --> set to "None".
To remove the Status Bar so you don't see the "No Service" and the "x" on the service bars, go to ADW Settings - UI Settings - Screen Preferences - Scroll down and click on "Hide Status Bar". And right above it, you can set the home orientation to landscape so it will be more like your tablet.
This will leave your phone with a fully customizable blank screen just like a tablet. There's also a lot of themes that you can download for free that will allow you to customize each individual icon to suit your taste. Hope this helps.
And about wiping the phone software, if sdrawkcab25 can't figure it out, it just means there is no way to remove it.