Hotspot URL / Link pointing at a File

In the Rich Text create a URL Hotspot using the following syntax (omit the 
single quotes):

'file://localhost/<drive>/<path_replace_backslash_by_slash>/<file
name.extension>'

E.g. use 
	'file://localhost/C:/Documents%20and%20Settings/User1/Projects/Project%
20Overview.xls'

to link to
	'C:\Documents and Settings\User1\Projects\Project Overview.xls'

This works for me with Win2000prof + R5.0.2c + IE5, although usability and
convenience seem to differ considerably depending on the kind of application
associated with the file.

Didn't validate other OS, (mapped) network drives / hosts and Netscape browser
so your feedback whether this really is a useful tip is very appreciated.

Have fun!