G.T.
Tell her to write out an affidavit about the felony, how it occured, the circumstances and what she did to pay off the debt to society. If she went to dwi school afterwards and recieved a certificate of completion she can be prepared to show that at interview time. Don't apply for jobs that require her to do any driving for the company. She may not be just getting turned down due to the felony, maybe her resume isnt all that great and needs some sprucing up. Doing volunteer work inbetween jobs is also useful to make a resume look better.
Best lesson from this is to learn from other's mistakes. Having a felony or a bad credit score plays a big part in our futures, it's important to believe that at a young age and not put yourself into a position to detriment our future.
This is why you shove that type of info down your young childrends throats as soon as they are old enough to realize what you are talking about. An ounce of prevention goes a long, long way.
Your friend might hire a lawyer to see if she can have that taken off of her record.... the couple of hundred bucks to do so might benefit her in the long run. Look into that.