fileRename()
Rename a file. Filename can be then path+filename.
Syntax:
fileRename( 
filename
, 
newname
 )
filename
 is the file you want to rename.
newname
 is the new name you want to give to it.
You must specify full or relative path if files don't lies on program directory.
You can still use old 
rename() command instead.
Example:
fileRename( "myfile.txt", "renamedfile.txt" )