I modified the run batch file so you can press X on the cmd when it runs and the client still loads/runs
I forgot what I've done because I did this months ago, but here's the code.
Right click > Run.bat > edit
title RuneRebels
javaw -Xmx256M -jar .\jar\loader.jar -configurl http://www.runerebels.com/resources/config.agf
exit
I think I've just added exit to the end of the script, but idk ;o