Update README
diff --git a/README b/README
index b49943e..f452c8a 100644
--- a/README
+++ b/README
@@ -16,9 +16,13 @@
  - libnuma
  - libpthread
  - librt
- Compling PSIO driver requires kernel headers.
+
+Compling PSIO driver requires kernel headers.
   - For Debian/Ubuntu, try apt-get install linux-headers-$(uname -r)
 
+** PSIO requires Intel 82599-based 10 GbE cards and Linux 2.6 kernel **
+  = Please refer to http://shader.kaist.edu/packetshader/io_engine/
+
 ========================================================================
  INCLUDED DIRECTORIES
 ========================================================================
@@ -53,7 +57,7 @@
 
 2. install the driver
   - ./install.py <# cores> <# cores>
-  - refer to http://shader.kaist.edu/packetshader/io_enigne/
+  - refer to http://shader.kaist.edu/packetshader/io_engine/
   - you may need to change the ip address in install.py:46
 
 3. make in io_engine/lib