This macro renames all files in a given folder to "file1", "file2", "file3" etc. Just keep pressing Ctrl + Alt + Z in Macro Recorder and the macro will iterate to the next file.
SET CLIPBOARD : 1 WAIT FOR USER : 90 : 3 : 0 : 0 LABEL : BEGIN Keyboard : F2 : KeyPress TYPE TEXT : file PASTE Keyboard : Return : KeyPress INCREMENT CLIPBOARD : 1 Keyboard : Down : KeyPress WAIT FOR USER : 90 : 3 : 0 : 0 GOTO : BEGIN