changing directory name

[Guest]

This is what I have:

http://MYDOMAIN.HOST NAME.com/test/nfoscomm/catalog/index.php?

Question is Which files need to be edited to change test & nfoscomm.

I tried changing in configure php and renaming the folders but there are apparently more files to edit.

Second- if I remove the .HOST NAME in configure will that move the shop to MYDOMAIN.com?

Thanks