In lots of MOSS development we are using custom aspx/html or just office templates and we need to save them in the local server file system. We can use the layouts folder (/_layouts/...) or create our own path.
To do so create a feature.xml and element.xml, in the element file add the Module tab, in the SetupPath attribute write the file system folder path (like FEATRUES\mosswat), and in the Url attribute write the new url (like _mosswat/templates).
Run the stsadm segment.
Now enter in the explorer the following: http://WebApp/sites/SiteCollection/_mosswat/templates/filename.docx