diff --git a/README.md b/README.md
index 14fbac7..be1d12f 100644
--- a/README.md
+++ b/README.md
@@ -15,17 +15,17 @@ Makes a list of all snapshots, kernels, initramfs present on the filesystem and
 
 #### How to use it :
 
-1. Edit 41_snapshots-btrfs file :
+1. Add lines to /etc/default/grub as needed, defaults listed as examples:
+2. 
+	* submenuname = name menu appear in grub ( e.g: GRUB_BTRFS_SUBMENUNAME="ArchLinux Snapshots" )
 
-	* submenuname = name menu appear in grub ( e.g: submenuname="ArchLinux Snapshots" )
+	* prefixentry = add a name ahead your snapshots entries ( e.g: GRUB_BTRFS_PREFIXENTRY="Snapshot" )
 
-	* prefixentry = add a name ahead your snapshots entries ( e.g: prefixentry="Snapshot" )
+	* nkernel= name kernel you use it ( e.g: GRUB_BTRFS_NKERNEL=("vmlinuz-linux") )
 
-	* nkernel= name kernel you use it ( e.g: nkernel=("vmlinuz-linux") )
+	* ninit= name initramfs (ramdisk) you use it ( e.g: GRUB_BTRFS_NINIT=("initramfs-linux.img" "initramfs-linux-fallback.img") )
 
-	* ninit= name initramfs (ramdisk) you use it ( e.g: ninit=("initramfs-linux.img" "initramfs-linux-fallback.img") )
-
-	* intel_ucode= name intel microcode you use it ( e.g: intel_ucode=("intel-ucode.img") )
+	* intel_ucode= name intel microcode you use it ( e.g: GRUB_BTRFS_INTEL_UCODE=("intel-ucode.img") )
 
 2. Generate grub.cfg (on Archlinux is grub-mkconfig -o /boot/grub/grub.cfg )