I graduated from Emily Griffith (LPN) in February of this year and at the time I applied was the easiest to get into; the prereqs were pretty minimal, but I've heard they've made the prereqs tougher. Mostly what made it easier was that they tell you what you have to do to complete your file and then take the first 25 students who complete it and waitlist the rest. From what I remember, in addition to the prereqs (I'm not going to give details because once again, they've changed) I had to submit my high school transcript, attend an orientation, provide two letters of recommendation (they did not have to be nursing related), and pass the reading/math assessments. They did not require an interview which was nice. They also admit twice a year, so if you have not been accepted by the time the February class starts you get priority for the August class, etc.
You can find more info at http://www.egos-school.com/
. I recommend you call and talk to Barbara Maestas; she's the secretary/coordinator and has all the info re being accepted, etc. Good luck!
Also consider that if you move to CO it takes a year to become a resident, so you will be paying out-of-state tuition which is pretty pricey.