Hey kam, I did this a while back and one of the steps is deleting the HTC keyboard. I assumed it was the unused one but it seems my main HTC Touch Input keyboard has vanished.
EDIT: I extracted the HTC_IME.apk from the Galaxo zip and this installed ok.
It required a reboot before it would let me select it in Settings > Locale & text.
I now have my HTC keyboard back. Thanks for your help haha