First you’ll need to download Astro or some other File/App manager from the Android market. Next download the zip with both apks here. Place the apks on your sd card and install them with Astro. Once installed all you have to do is go to the Android settings -> Language & keyboard, under Keyboard Settings you’ll see HTC_IME mod and a check box next to it, check it to make it your primary input method. Below the check box you’ll see the settings menu click on that and customize to your hearts desire.
Try it out if you don’t like it you can always go back to what you had before but if you do like it and would like to donate to the developer jonsil please visit: http://android.hallerud.se/donate.html
If if there is something you don’t like and are feeling up to the challenge here’s the source code: http://www.hallerud.se/htc_ime_mod_dev27.zip