Editor: Advanced features:
Shows output from shell as script runs.
kext permissions: sets permissions to all files in your extensions folder.
make script: makes a install script for the chosen kexts.
tag cache rebuild: makes script for touch extensions folder, so cache gets rebuild on next boot.
Run ->: runs the current script, so be sure you got no errors if you edited it.
Backup:
When you already have a file with the name you are installing, the old one will be put in a folder name "Backup Extensions" on the root of your system disk.