Start out with a keyboard image in height with your screen. You could use one of the images you'll find on this site, such as one of mine:

Either print the image on paper and stick it near your screen somewhere (I have one on my coffee mug - also doubles as an attempt at a conversation starter although people don't often bite), or just use it as a desktop object.

I (re-)wrote a small app to show an image onscreen, the first version of which is found here: http://folk.uio.no/obech/Files/Keyboard … Screen.zip

I've been working on that to improve it further, but it's not finished yet and it's not going fast. If you'd like to try its' current state, let me know.

Once you've used this "crutch" for a while, you'll be truly liberated and can type Colemak blind (and most likely will disregard your old QWERTY skills enough that you no longer can type QWERTY blind unless you get a little re-training - I always look at the keys when typing QWERTY now, but at least it isn't really slow). I wouldn't stress that transition overmuch, as it'll come to you quite naturally when your memory is ready.