--- convertor.py        (revision 47)
+++ convertor.py        (working copy)
@@ -120,6 +120,29 @@
                linker = target['linker']
                linker = linker(source, dest, linkwrapper, converted)
                linker.output(result)
-
+
+
+def Usage():
+       print "%s: Usage: %s sourcefile targetfile targetplatform" % (sys.argv[0], sys.argv[0])
+       print ""
+       print "\tsourcefile\tProgram to alkynate"
+       print "\ttargetfile\tOutput filename for the new binary"
+       print "\ttargetplatform\tPlatform to convert to, see TARGETS below"
+       print ""
+       print "!!!Don't forget that you have to be located in the Converter directory!!!"
+       print ""
+       print "TARGETS"
+       print "Currently supported targets:"
+       for target in Targets.__targets__:
+               print "  %s" % target.__target_desc__['name']
+       print ""
+       print "EXAMPLES"
+       print "%s /mnt/windows/winmine.exe /tmp/winmine.linux Linux" % sys.argv[0]
+
+
 if __name__=='__main__':
-       sys.exit(Convertor().convertCLI(sys.argv[1:]))
\ No newline at end of file
+       if len(sys.argv) < 4:
+               Usage();
+               sys.exit(1);
+
+       sys.exit(Convertor().convertCLI(sys.argv[1:]))