Advice on extending wireless range / router recommendation

[lafinfil]

Thanks for that additional info.

I'm not getting into any after market antenna or the like.

If I can throw the signal far enough with a wireless G or N I'll do it

It's for her convenience not mine. If we can get something off the shelf then I get a new router ... that I don't need.
She offered to leave it when she finishes class. She and her siblings (that live out of the area)
would like to have wireless when they visit their mom.