Stock Photography and Identity Theft

[jackson3000]

I want to set up a myspace profile with a weight loss theme but want to use a female profile. I intend to use a photo from stock photography. Not sure in terms of the law about using a stick photo next to a psedonym. I also want to do the same with Squidoo etc. so she'd be basically part of the branding. Would the model in the stock photo have a case against me?

Thanks, Jackson