No, but you can create a meta redirect tag in your index file to forward Website visitors to the correct folder.
An example of a meta redirect is:
<meta http-equiv="refresh" content="1;url=http://www.coolexample.com/secondaryfolder/site_to_forward_to.html">
This example creates a forward after 1 second to http://www.coolexample.com/secondaryfolder/site_to_forward_to.html.
For more information about using DotNetNuke on your website through your Windows shared hosting account, see What is DotNetNuke 4.0 (DNN)?