Depending on what you want in a chat addon, Chat Frame Extender may like you better. It throws the input bar over the chat window by default, and you can move it with alt+drag, and resize it with shift + drag. It doesn't have nearly as much fluff, er, options that Prat does though, and you see that in memory use (115KiB vs. 1-3MiB)
Chat Frame Extender 2 : WoWInterface Downloads : Chat Mods
That said, someone posted how to move the chat input with Prat on the UI forums, I just don't recall what the option was. It's there somewhere though!