diff -Nur e-smith-grub-2.6.1.old/root/etc/e-smith/templates/etc/default/grub/GrubSplash e-smith-grub-2.6.1/root/etc/e-smith/templates/etc/default/grub/GrubSplash
--- e-smith-grub-2.6.1.old/root/etc/e-smith/templates/etc/default/grub/GrubSplash	2016-06-15 22:30:29.000000000 +0200
+++ e-smith-grub-2.6.1/root/etc/e-smith/templates/etc/default/grub/GrubSplash	2017-05-11 01:46:40.803368900 +0200
@@ -1,4 +1,26 @@
 {
-    push @lines, 'GRUB_BACKGROUND="/boot/grub/smeserver10.png"'  unless ( grep  /GRUB_BACKGROUND/, @lines );
+    # grub splash image for koozali, alternative to theme
+    # ignored if a theme is defined
+    #GRUB_BACKGROUND="/boot/grub2/smeserver10.png"
+    my $GrubBackground= $Sysconfig{'GrubBackground'} || '/boot/grub2/smeserver10.png';
+    # remove if disabled, : you do not want any background
+    if ($GrubBackground eq 'disabled') {
+        @lines = map {
+                s/^GRUB_BACKGROUND.*//;
+                $_
+        } @lines;
+    }
+    else {
+
+        # change if line already there
+        @lines = map {
+                /^GRUB_BACKGROUND/ && ! /="$GrubBackground"/ && s/=".*"/="$GrubBackground"/;
+                $_
+        } @lines;
+
+        # add if line missing
+        push @lines, 'GRUB_BACKGROUND="$GrubBackground"'  unless ( grep  /GRUB_BACKGROUND/, @lines );
+    }
     $OUT = "";
+
 }
diff -Nur e-smith-grub-2.6.1.old/root/etc/e-smith/templates/etc/default/grub/GrubTheme e-smith-grub-2.6.1/root/etc/e-smith/templates/etc/default/grub/GrubTheme
--- e-smith-grub-2.6.1.old/root/etc/e-smith/templates/etc/default/grub/GrubTheme	1970-01-01 01:00:00.000000000 +0100
+++ e-smith-grub-2.6.1/root/etc/e-smith/templates/etc/default/grub/GrubTheme	2017-05-11 01:38:40.416370912 +0200
@@ -0,0 +1,31 @@
+{
+    # grub theme for koozali:
+    #GRUB_THEME="/boot/grub2/themes/koozali/theme.txt"
+    #GRUB_GFXMODE="1024x768"
+    my $GrubTheme = $Sysconfig{'GrubTheme'} || 'koozali';
+    my $GrubGFXMODE = $Sysconfig{'GrubGFXMODE'} || '1024x768';
+
+    # remove if disabled
+    if ($GrubTheme eq 'disabled') {
+        @lines = map {
+                s/^GRUB_GFXMODE.*//;
+                s/^GRUB_THEME.*//;
+                $_
+        } @lines;
+    }
+    else {
+
+        # change if line already there
+        @lines = map {
+                /^GRUB_GFXMODE/ && ! /="$GrubGFXMODE"/ &&  s/=".*"/="$GrubGFXMODE"/;
+                /^GRUB_THEME/ && ! /="\/boot\/grub2\/themes\/$GrubTheme\/theme.txt"/ && s/=".*"/="\/boot\/grub2\/themes\/$GrubTheme\/theme.txt"/;
+                $_
+        } @lines;
+
+        # add if line missing
+        push @lines, 'GRUB_GFXMODE="'.$GrubGFXMODE.'"'  unless ( grep  /GRUB_GFXMODE/, @lines );
+        push @lines, 'GRUB_THEME="/boot/grub2/themes/'.$GrubTheme.'/theme.txt"'  unless ( grep  /GRUB_THEME/, @lines );
+    }
+    "";
+}
+