Creating script by your self...

1. Create folder 'scripts' under L2Tower folder if not exists (Is that folder with L2Tower.dll).
2. Create new file in 'scripts' folder. File have to be called anyname.lua (Note: don't use spaces or '_' char in file name)
3. Put script code into that file (ANSI file type)
4. In game do: //CFG -> Scripts -> And press '>' button on left of script what you want to run, or just write ingame .scriptStart anyname.lua
   

Creating script by using Script Recorder

1. Create folder 'scripts' under L2Tower folder if not exists (Is that folder with L2Tower.dll).
2. Write .recStart anyname
3. Do any actions you need
4. Write .recStop
5. In game do: //CFG -> Scripts -> And press '>' button on left of script what you want to run, or just write ingame .scriptStart anyname.lua
   

Information about list of classes and functions in scripts you can find here:
http://forum.l2tower.eu/showthread.php?tid=170.

Sample scripts you can find here: http://forum.l2tower.eu/forumdisplay.php?fid=28