Use RealURL in sub-directory

Write this in the TYPOSCRIPT-Setup:

config.simulateStaticDocuments = 0
config.baseURL = http://localhost/subdirectory/
config.tx_realurl_enable = 1

And this to your .htaccess-file.

RewriteBase /subdirectory/

While "subdirectory" is the name of the sub-directory. Change this to your purpose.

If it doesn't work, look if you try hard-coded links, which is a common mistake. I did that mistake yesterday, ;-).