The "says:" can also be removed by editing msgslang.dll file. In order to do this, you need to open up msgslang.dll with some hex editor (for example
Resource Hacker) and find the "says:" part. It should be located at:
String table -> 127 -> 2030
String table -> 626 -> 10001 and 10002
String table -> 2569 -> 41101
After editing Compile script and save the file.
NOTE: With reference to fully detailed answer, you don't need to edit string 100001, 100002 and 41101. AND, be sure you leave space after "%1", so it would be something like "%1 :" or "%1 ".
See
this answer to similar problem.