open notepad and past the following code:
@echo off
cd C:\Users\ [Your User] \jagexcache\jagexlauncher\bin\
start JagexLauncher.exe oldschool
cd C:\Users\ [Your User] \jagexcache\jagexlauncher\bin\
start JagexLauncher.exe oldschool
cd C:\Users\ [Your User] \jagexcache\jagexlauncher\bin\
start JagexLauncher.exe oldschool
cd C:\Users\ [Your User] \jagexcache\jagexlauncher\bin\
start JagexLauncher.exe oldschool
cd C:\Users\ [Your User] \jagexcache\jagexlauncher\bin\
start JagexLauncher.exe oldschool
exit
Now replace [Your User] with whatever your account name is on your operating system.
Now that you have the correct path to the RuneScape exe. Save the file on your desktop. But don't save it as a .txt. save it as a .bin. This code is for 5 windows. Copy and past below code before exit if you'd like to add more.
Double click the .bin file on your desktop and it will instantly open up 5 windows.