Trouble with Read/Write permissions

I am trying to install Gallery 2.0 using the One-click install. When I get to Step 4 (Storage Set-up) I encounter a problem. The directory it uses: /home/MyName/MyName.com_Gallery_g2data needs to have write permission instead of just Read Only. However, the directory is owned by “Root” so there is no way for me to change the permissions of this directory. Currently, it is set to rwxr–r--. What should I do?

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