diff --git a/data/grid5000/environments/lenny-x64-base-1.0.json b/data/grid5000/environments/lenny-x64-base-1.0.json
index 24c5b77868a4c22db6b7363b8fe97a33c86e21e2..e56fbc1767532cc596dfffa5ec1a3080c5d25d1d 100644
--- a/data/grid5000/environments/lenny-x64-base-1.0.json
+++ b/data/grid5000/environments/lenny-x64-base-1.0.json
@@ -30,7 +30,7 @@
     "md5": null,
     "path": "\/grid5000\/images\/lenny-x64-base-1.0.tgz"
   },
-  "kernel": null,
+  "kernel": "2.6.26.2",
   "max_open_files": 8192,
   "services": [
 
diff --git a/data/grid5000/environments/lenny-x64-big-1.0.json b/data/grid5000/environments/lenny-x64-big-1.0.json
new file mode 100644
index 0000000000000000000000000000000000000000..365066ed9b770c98222b97e3d48b8a6e262693af
--- /dev/null
+++ b/data/grid5000/environments/lenny-x64-big-1.0.json
@@ -0,0 +1,41 @@
+{
+  "accounts": [
+    {
+      "login": "root",
+      "password": "grid5000"
+    }
+  ],
+  "applications": [
+    "Vim",
+    "XEmacs",
+    "JED",
+    "nano",
+    "JOE",
+    "Perl",
+    "Python",
+    "Ruby"
+  ],
+  "based_on": "Debian version lenny for amd64",
+  "consoles": [
+    {
+      "bps": 34800,
+      "port": "ttyS0"
+    }
+  ],
+  "file": {
+    "md5": "b2e48586472579ac2b908816175e4aa6",
+    "path": "\/grid5000\/images\/lenny-x64-big-1.0.tgz"
+  },
+  "kernel": "2.6.26.2",
+  "max_open_files": 8192,
+  "services": [
+    "ldap",
+    "nfs"
+  ],
+  "state": "stable",
+  "tcp_bandwidth": 1000000000,
+  "type": "environment",
+  "uid": "lenny-x64-big-1.0",
+  "valid_on": "Dell PE1855, Dell PE1950, HP DL140G3, HP DL145G2, IBM x3455, IBM e325, IBM e326, IBM e326m, Sun V20z, Sun X2200 M2, Sun X4100, Altix Xe 310",
+  "x11_forwarding": true
+}
\ No newline at end of file
diff --git a/data/grid5000/environments/lenny-x64-nfs-1.0.json b/data/grid5000/environments/lenny-x64-nfs-1.0.json
new file mode 100644
index 0000000000000000000000000000000000000000..49b7bea714c91d78dd6107109a87e3a59ad040e9
--- /dev/null
+++ b/data/grid5000/environments/lenny-x64-nfs-1.0.json
@@ -0,0 +1,41 @@
+{
+  "accounts": [
+    {
+      "login": "root",
+      "password": "grid5000"
+    }
+  ],
+  "applications": [
+    "Vim",
+    "XEmacs",
+    "JED",
+    "nano",
+    "JOE",
+    "Perl",
+    "Python",
+    "Ruby"
+  ],
+  "based_on": "Debian version lenny for amd64",
+  "consoles": [
+    {
+      "bps": 34800,
+      "port": "ttyS0"
+    }
+  ],
+  "file": {
+    "md5": "89448d214db5477e3ac6ef39ed0e7f6e",
+    "path": "\/grid5000\/images\/lenny-x64-nfs-1.0.tgz"
+  },
+  "kernel": "2.6.26.2",
+  "max_open_files": 8192,
+  "services": [
+    "ldap",
+    "nfs"
+  ],
+  "state": "stable",
+  "tcp_bandwidth": 1000000000,
+  "type": "environment",
+  "uid": "lenny-x64-nfs-1.0",
+  "valid_on": "Dell PE1855, Dell PE1950, HP DL140G3, HP DL145G2, IBM x3455, IBM e325, IBM e326, IBM e326m, Sun V20z, Sun X2200 M2, Sun X4100, Altix Xe 310",
+  "x11_forwarding": true
+}
\ No newline at end of file
diff --git a/data/grid5000/environments/lenny-x64-xen-1.0.json b/data/grid5000/environments/lenny-x64-xen-1.0.json
new file mode 100644
index 0000000000000000000000000000000000000000..e6998fe6b0348a33bfc1758d7ff1b0f4e11cd63a
--- /dev/null
+++ b/data/grid5000/environments/lenny-x64-xen-1.0.json
@@ -0,0 +1,40 @@
+{
+  "accounts": [
+    {
+      "login": "root",
+      "password": "grid5000"
+    }
+  ],
+  "applications": [
+    "Vim",
+    "XEmacs",
+    "JED",
+    "nano",
+    "JOE",
+    "Perl",
+    "Python",
+    "Ruby"
+  ],
+  "based_on": "Debian version etch for amd64",
+  "consoles": [
+    {
+      "bps": 34800,
+      "port": "ttyS0"
+    }
+  ],
+  "file": {
+    "md5": "3e292c686c3ed0b417e44fdde5ec1771",
+    "path": "\/grid5000\/images\/lenny-x64-xen-1.0.tgz"
+  },
+  "kernel": "2.6.26-2-xen-amd64",
+  "max_open_files": 8192,
+  "services": [
+
+  ],
+  "state": "testing",
+  "tcp_bandwidth": 1000000000,
+  "type": "environment",
+  "uid": "lenny-x64-xen-1.0",
+  "valid_on": "Dell PE1855, Dell PE1950, HP DL140G3, HP DL145G2, IBM x3455, IBM e325, IBM e326, IBM e326m, Sun V20z, Sun X2200 M2, Sun X4100, Altix Xe 310",
+  "x11_forwarding": true
+}
\ No newline at end of file