Little help with model shot

Hey guys - I am setting up a Domain name / hosting registration website and I have everything up and running except for one thing… my Front Page Model! I’m using a generic one right now until i can replace it with one of my own. I took some shots and have narrorwed it down to 2 pictures. and I cannot get either of them to look right. im trying to change the eye color to a nice bright blue and the color of her neclace to a ‘fadedblue-like’ color. i have messed with the hue/saturation tools a bit and was able to find a nice shade i like… but the thing i am having the most trouble on is deleting the backround. i want it to look like she is just standing there with a white backdrop.

is there anyone here that thinks they can delete a backround pretty good? im going to upload the originals and if anyone can just delete the backround out nicely, it would be greatly appriciated. as a bonus anyone that helps me will receieve discounts for any of my products/services for life.

check out fadedbluestar.com for an idea of where the model is going to be. (replacing the blonde girl)