I'm so glad you found your grandmother here!
I am one of the leaders of the Greeter Project, and we would love to have you create an account so that you can help to add your information to your grandmother's profile and, hopefully, to other members of your family.
You can start by going to http://www.wikitree.com/
and creating a profile in your own name. Our Greeters will take it from there! :-)
If you have any questions, please feel free to contact me!