diff --git a/sys/BootSync/bootsync.py b/sys/BootSync/bootsync.py
index 62d1e00..e01b197 100755
--- a/sys/BootSync/bootsync.py
+++ b/sys/BootSync/bootsync.py
@@ -245,8 +245,11 @@ class BootSync(object):
             return (None)
         if not os.path.isfile(fpathname):
             return(None)
+        if hashtype not in hashlib.algorithms_available:
+            raise ValueError('Hashtype {0} is not supported on this system'.format(hashtype))
+        hasher = getattr(hashlib, hashtype)
         fpathname = os.path.abspath(os.path.expanduser(fpathname))
-        _hash = hashlib.sha512()
+        _hash = hasher()
         with open(fpathname, 'rb') as fh:
             _hash.update(fh.read())
         return (_hash.hexdigest())
diff --git a/sys/BootSync/prep.txt b/sys/BootSync/prep.txt
index e68cdbe..a1b7f4d 100644
--- a/sys/BootSync/prep.txt
+++ b/sys/BootSync/prep.txt
@@ -17,7 +17,7 @@ PREPARATION:
 
   grub-install \
       --boot-directory=/mnt/boot2 \
-      --bootloader-id=Arch \
+      --bootloader-id="Arch (Fallback)" \
       --efi-directory=/mnt/boot2/ \
       --target=x86_64-efi \
       --no-nvram  \
@@ -34,7 +34,7 @@ PREPARATION:
 # 
 #   grub-install \
 #       --boot-directory=/mnt/boot2 \
-#       --bootloader-id="Arch (Fallback)" \
+#       --bootloader-id="Arch" \
 #       --efi-directory=/mnt/boot2/ \
 #       --target=x86_64-efi \
 #       --no-nvram  \
@@ -46,7 +46,7 @@ PREPARATION:
       --create \
       --disk /dev/sdd \
       --part 1 \
-      --loader /EFI/Arch/grubx64.efi \
+      --loader /EFI/Arch (Fallback)/grubx64.efi \
       --label "Arch (Fallback)"
 
   efibootmgr \