Update README

2 files changed, 4 insertions, 2 deletions

diff --git a/README.md b/README.md
index 58a1371..6909aa1 100644
--- a/README.md
+++ b/README.md
@@ -10,10 +10,12 @@ Currently, you can use redseafs to create/modify/read RedSea ISO.C files on any
 
 # Commands
 
-`isoc-mount [--rw] <filename.ISO.C> <mount_point>` will mount an ISO.C image on `mount_point`
+`isoc-mount [--rw] [--2k] <filename.ISO.C> <mount_point>` will mount an ISO.C image on `mount_point`
 
 Specify `--rw` to commit writes to ISO.C file, otherwise discarded on unmount.
 
+Specify `--2k` to pad ISO.C file to multiple of 2048 bytes, for compatibility with VirtualBox or burning to physical disc ONLY (These files will not mount in TempleOS, you will get `ERROR: Not RedSea`)
+
 If the ISO.C file does not exist, a blank filesystem will be created (and written on unmount if `--rw` specified.)
 
 `fusermount -u <mount_point>` to unmount
diff --git a/isoc-mount b/isoc-mount
index d382797..4b1c0a5 100755
--- a/isoc-mount
+++ b/isoc-mount
@@ -17,7 +17,7 @@ while ctr < len(sys.argv):
     ctr += 1
 
 if len(sys.argv) < 3:
-    print "Usage: " + sys.argv[0] + " [--rw] <filename.ISO.C> <mount_point>"
+    print "Usage: " + sys.argv[0] + " [--rw] [--2k] <filename.ISO.C> <mount_point>"
     print "       --rw:    commit writes to ISO.C file, otherwise discarded on unmount."
     print "                If the ISO.C file does not exist, a new one will be created."
     print "       --2k:    Pad ISO.C to multiple of 2048 bytes                         "