diff --git a/appliances/cisco-iosv.gns3a b/appliances/cisco-iosv.gns3a
index d24f4a2..c27db7d 100644
--- a/appliances/cisco-iosv.gns3a
+++ b/appliances/cisco-iosv.gns3a
@@ -4,7 +4,6 @@
     "description": "Cisco Virtual IOS allows user to run IOS on a standard computer.",
     "vendor_name": "Cisco",
     "vendor_url": "http://www.cisco.com/",
-    "documentation_url": "",
     "product_name": "IOSv",
     "product_url": "http://virl.cisco.com/",
     "registry_version": 1,
diff --git a/appliances/cisco-iosvl2.gns3a b/appliances/cisco-iosvl2.gns3a
index 12e43c9..3e2acf1 100644
--- a/appliances/cisco-iosvl2.gns3a
+++ b/appliances/cisco-iosvl2.gns3a
@@ -4,7 +4,6 @@
     "description": "Cisco Virtual IOS allows user to run IOS on a standard computer.",
     "vendor_name": "Cisco",
     "vendor_url": "http://www.cisco.com/",
-    "documentation_url": "",
     "product_name": "IOSvL2",
     "product_url": "http://virl.cisco.com/",
     "registry_version": 1,
@@ -29,7 +28,7 @@
             "md5sum": "0fb3c7e158e14e3ffbfa36bee6d592da",
             "version": "15.2(4.0.55)E",
             "download_url": "http://virl.cisco.com/",
-            "filename": "IOSvL2-15.2.4.0.55E.qcow2"
+            "filename": "IOSvL2-15.2.4055E.qcow2"
         }
     ],
 
@@ -37,7 +36,7 @@
         {
             "name": "15.2(4.0.55)E",
             "images": {
-                "hda_disk_image": "IOSvL2-15.2.4.0.55E.qcow2"
+                "hda_disk_image": "IOSvL2-15.2.4055E.qcow2"
             }
 
         }
diff --git a/appliances/cisco-nxosv.gns3a b/appliances/cisco-nxosv.gns3a
index f774c1a..93f9bf6 100644
--- a/appliances/cisco-nxosv.gns3a
+++ b/appliances/cisco-nxosv.gns3a
@@ -4,7 +4,7 @@
     "description": "NX-OSv is a reference platform for an implementation of the Cisco Nexus operating system, based on the Nexus 7000-series platforms, running as a full virtual machine on a hypervisor.",
     "vendor_name": "Cisco",
     "vendor_url": "http://www.cisco.com/",
-    "product_name": "IOSv",
+    "product_name": "NX-OSv",
     "product_url": "http://virl.cisco.com/",
     "registry_version": 1,
     "status": "stable",
diff --git a/appliances/microcore-linux.gns3a b/appliances/microcore-linux.gns3a
index beecee0..5f60073 100644
--- a/appliances/microcore-linux.gns3a
+++ b/appliances/microcore-linux.gns3a
@@ -1,7 +1,7 @@
 {
     "name": "Micro Core Linux",
     "category": "guest",
-    "description": "Micro Core Linux is a smaller variant of Tiny Core without a graphical desktop.\n\nIt's provide a complete Linux system in few MB.",
+    "description": "Micro Core Linux is a smaller variant of Tiny Core without a graphical desktop.\n\nThis is complete Linux system needing few resources to run.",
     "vendor_name": "Team Tiny Core",
     "vendor_url": "http://distro.ibiblio.org/tinycorelinux",
     "documentation_url": "http://wiki.tinycorelinux.net/",
@@ -11,7 +11,7 @@
     "status": "stable",
     "maintainer": "GNS3 Team",
     "maintainer_email": "developers@gns3.net",
-    "usage": "For version >= 6.4 Login is gns3 and password gns3. For older version it's tc. sudo work without password",
+    "usage": "For version >= 6.4, login/password is gns3. For older version it is tc. Note that sudo works without any password",
     "symbol": "linux_guest.svg",
 
     "qemu": {