diff --git a/chunkymap-regen.py b/chunkymap-regen.py
index 4c4cd7e..89f4f30 100644
--- a/chunkymap-regen.py
+++ b/chunkymap-regen.py
@@ -11,6 +11,7 @@ from timeit import default_timer as best_timer
 import time
 #copyfile etc:
 import shutil
+import math
 
 #best_timer = timeit.default_timer
 #if sys.platform == "win32":
@@ -353,6 +354,7 @@ class MTChunks:
     config_name = None
     config_path = None
     data_16px_path = None
+    data_160px_path = None
 
     def __init__(self):  #formerly checkpaths() in global scope
         os_name="linux"
@@ -560,7 +562,16 @@ class MTChunks:
         if not os.path.isfile(htaccess_path):
             self.deny_http_access(self.data_16px_path)
             print("  (created .htaccess)")
-        #TODO: deny access to each hundreds folder under self.data_16px_path? doesn't seem that important for security so maybe not.
+
+        self.data_160px_path = os.path.join(self.chunkymap_data_path, "160px")
+        if not os.path.isdir(self.data_160px_path):
+            os.makedirs(self.data_160px_path)
+            print("Created '"+self.data_160px_path+"'")
+        if not os.path.isfile(htaccess_path):
+            self.deny_http_access(self.data_160px_path)
+            print("  (created .htaccess)")
+        
+        #TODO: deny recursively under these folders? doesn't seem that important for security so maybe not (no player info is there)
 
 
         self.install_website()
@@ -699,20 +710,32 @@ class MTChunks:
 
     def get_signal_path(self):
         return os.path.join(os.path.dirname(os.path.abspath(__file__)), self.get_signal_name())
+        
+    
 
     def get_chunk_folder_path(self, chunky_x, chunky_z):
         result = None
-        decachunk_x = None
-        decachunk_z = None
-        if chunky_x<0:
-            decachunk_x = chunky_x + chunky_x%10
-        else:
-            decachunk_x = chunky_x - chunky_x%10
-        if chunky_z<0:
-            decachunk_z = chunky_z + chunky_z%10
-        else:
-            decachunk_z = chunky_z - chunky_z%10
-        result = os.path.join( os.path.join(self.data_16px_path, str(decachunk_x)), str(decachunk_z) )
+        decachunk_chunky_x = None
+        decachunk_chunky_z = None
+        #if chunky_x<0:
+        #    decachunk_chunky_x = chunky_x + chunky_x%10
+        #else:
+        #    decachunk_chunky_x = chunky_x - chunky_x%10
+        #if chunky_z<0:
+        #    decachunk_chunky_z = chunky_z + chunky_z%10
+        #else:
+        #    decachunk_chunky_z = chunky_z - chunky_z%10
+        #NOTE: floor converts -.5 to -1 (and -1.5 to -2) but .5 to 0
+        decachunk_chunky_x = int(math.floor(chunky_x/10))
+        decachunk_chunky_z = int(math.floor(chunky_z/10))
+        result = os.path.join( os.path.join(self.data_16px_path, str(decachunk_chunky_x)), str(decachunk_chunky_z) )
+        return result
+
+    def get_decachunk_folder_path_from_chunk(self, chunky_x, chunky_z):
+        result = None
+        superchunky_x = int(math.floor(chunky_x/100))
+        superchunky_x = int(math.floor(chunky_z/100))
+        result = os.path.join( os.path.join(self.data_160px_path, str(superchunky_x)), str(superchunky_x) )
         return result
 
     def create_chunk_folder(self, chunky_x, chunky_z):
diff --git a/install-chunkymap-on-ubuntu.sh b/install-chunkymap-on-ubuntu.sh
index a97f559..8c79421 100644
--- a/install-chunkymap-on-ubuntu.sh
+++ b/install-chunkymap-on-ubuntu.sh
@@ -47,7 +47,7 @@ cp -f "$CHUNKYMAP_INSTALLER_PATH/unused/set-minutely-crontab-job.sh" "$CHUNKYMAP
 if [ ! -d "$CHUNKYMAP_DEST/web" ]; then
 	mkdir "$CHUNKYMAP_DEST/web"
 fi
-cp -Rf $CHUNKYMAP_INSTALLER_PATH/web/* "$CHUNKYMAP_DEST/web/"
+cp -Rf "$CHUNKYMAP_INSTALLER_PATH/web" "$CHUNKYMAP_DEST/"
 
 #if [ ! -d "$CHUNKYMAP_DEST/chunkymap" ]; then
 #  mkdir "$CHUNKYMAP_DEST/chunkymap"
diff --git a/web/chunkymap.php b/web/chunkymap.php
index 5c4edf2..87612f5 100644
--- a/web/chunkymap.php
+++ b/web/chunkymap.php
@@ -244,12 +244,13 @@ function echo_map_heading_text() {
 // }
 function get_chunk_folder_path($x, $z) {
 	global $chunkymapdata_path;
-	$decachunk_x = null;
-	$decachunk_z = null;
-	if ($x<0) { $decachunk_x = $x + $x%10; }
-	else { $decachunk_x = $x - $x%10; }
-	if ($z<0) { $decachunk_z = $z + $z%10; }
-	else { $decachunk_z = $z - $z%10; }
+	//NOTE: floor converts -.5 to -1 (and -1.5 to -2) but .5 to 0
+	$decachunk_x = intval(floor($x/10));
+	$decachunk_z = intval(floor($z/10));
+	//if ($x<0) { $decachunk_x = $x + $x%10; }
+	//else { $decachunk_x = $x - $x%10; }
+	//if ($z<0) { $decachunk_z = $z + $z%10; }
+	//else { $decachunk_z = $z - $z%10; }
 	$result = $chunkymapdata_path.'/16px/'.$decachunk_x.'/'.$decachunk_z;
 	return $result;
 }