idx = xad.LocateFile(id, name$[, table])
name$ inside the xad archive
specified by id and returns its index if it is found, otherwise -1 is returned.
The optional table argument can be used to specify further options. The following table tags are currently recognized:
NoCase:True, xad.LocateFile() won't distinguish between upper
and lower case characters. This makes the search slower. Defaults to False.
NoDir:True, xad.LocateFile() will just match the file name so it
will also trigger if the file is in a subdirectory in the archive. Defaults to False.