Joomla related

Romania
May 4, 2011 1:07pm CST
I have some questions regarding joomla,one how can I set the domain address to be www.domain.com/windows not www.domain.com/index.And if you are using JDownloads can you tell me how can i make subcategories,like you have the windows category and make subcategories like anti-virus browsers etc.Thank you.
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