There are two answers, first you could turn on the 'hide root folder' option in web.config - then you can have as many folders in the root as you like - without them forming part of the url.
umbracoHideTopLevelNodeFromPath Causes the top level content items to
be excluded from any url paths. For example, this is pre-set to True,
so:
[Content]Home = /home.aspx or /home/
[Content]Home\Projects = /projects.aspx or /projects/
[Content]Footer\Page1 = /page1.aspx or /page1/
[Content]Home\Projects\About = /projects/about.aspx or /projects/about/
http://our.umbraco.org/wiki/reference/webconfig
Secondly there are four 'hidden' redirect fields on every umbraco node (which you can add into the document type) which can change the url routing:
- umbracoRedirect (content picker) - Umbraco will redirect to the picked page
- umbracoInternalRedirectId (content picker) - Umbraco will load the picked page without changing the url
- umbracoUrlName (textstring) - Umbraco will override the page’s default url
- umbracoUrlAlias (textstring) - You can have several urls for the same page (not sure when this is useful)
So I guess in your scenario umbracoUrlName will pick out a page in your combined folder but with a url that you choose.
So you have
homepage
|- footer
|-page1 (umbracoUrl = "/footer-page1/")
and /footer-page1/ would render your page stored in the footer folder.
You could also hack things about and make umbracoRedirect & umbracoInternalRedirectId work but I'm not sure that it would help.