Do whatever you want to do just make sure it is on your terms. I helped an old lady with stuff (i.e. friendzoned) and it turned very ugly when another guy got involved in the picture. So ask yourself, how would you feel if this girl met another guy she was really attracted to and didn't come up with these excuses, or another man is involved, how would you feel about that?
The worst I got was when I picked up this lady from her work-place and waited a couple of hours for her. Then I found out another guy was also waiting for her in the parking lot who came a good 45 min rush-hour distance away and she went into my car instead. From what point I realize this woman is just using people and you can't take her seriously.
The way that ended very badly where we are both enemies now is again a good reason not to deal with this girl. You can end up an enemy with her if you help her, and if she's such a hot girl, other guys will help her just the same just to be in her life. Let another chump help her. Tell her you are busy and can't make it. You have a life that's not waiting for her.