diff --git a/repository/plugin.jelly b/repository/plugin.jelly
index 3b3841be..f6c3bcfe 100644
--- a/repository/plugin.jelly
+++ b/repository/plugin.jelly
@@ -15,7 +15,7 @@
      !-->
     <define:tag name="exec">
        <exec dir="." executable="${maven.ssh.executable}">
-         <arg line="${maven.repo.central} -l ${maven.username} '${command}'"/>
+         <arg line='${maven.repo.central} -l ${maven.username} "${command}"'/>
        </exec>
     </define:tag>
     
@@ -67,7 +67,7 @@
       <j:set var="command" value="cd ${directory}" />
       <j:set var="command" value="${command};chmod -R g+w *" />
       <j:set var="command" value="${command};chmod -R a+r *" />
-      <j:set var="command" value="${command};chgrp -R maven *" />
+      <j:set var="command" value="${command};chgrp -R ${maven.repository.group} *" />
       <j:set var="command" value="${command};rm ${groupId}.license" />
       <j:set var="command" value="${command};ln -s ${fileName} ${groupId}.license" />
       <repository:exec command="${command}" />
@@ -98,7 +98,7 @@
      
        <echo>Processing project ${group.text}</echo>
        <j:set var="directory" value="${maven.repo.central.directory}/${group.text}/licenses" />
-       <j:set var="command" value="mkdir -p ${directory}; chmod g+ws ${directory}; chgrp maven ${directory}" />
+       <j:set var="command" value="mkdir -p ${directory}; chmod g+ws ${directory}; chgrp ${maven.repository.group} ${directory}" />
        <echo>Checking directory '${directory}'</echo>
        <repository:exec command="${command}"/>
 
@@ -205,7 +205,7 @@
     </j:if>
     <j:set var="command" value="cd ${maven.repo.central.directory}"/>
     <j:set var="command" value="${command};mkdir ${groupId}" />
-    <j:set var="command" value="${command};chgrp maven ${groupId}"/>
+    <j:set var="command" value="${command};chgrp ${maven.repository.group} ${groupId}"/>
     <j:set var="command" value="${command};chmod g+s ${groupId}"/>
     <j:set var="command" value="${command};mkdir ${groupId}/distributions"/>
     <j:set var="command" value="${command};mkdir ${groupId}/jars"/>
@@ -232,7 +232,7 @@
   
   <!-- this is pretty much a copy of whats in jar:deploy-snapshot -->
   <goal name="repository:deploy-snapshot-jar"
-    description="deploy a snapshot jar, specified by file, to the repository">
+    description="deploy a snapshot jar, specified by groupId and artifact, to the repository">
     
     <j:if test="${empty(artifact)}">
       <fail>artifact must be specified</fail>
@@ -241,7 +241,7 @@
       <fail>groupId must be specified</fail>
     </j:if>
     <j:if test="${empty(artifactId)}">
-      <fail>artifactId must be specified</fail>
+      <j:set var="artifactId">${groupId}</j:set>
     </j:if>
     <!-- work out snapshotVersion from artifact -->
     <!-- artifact is format blah-yyyymmdd.hhmmss.jar -->
@@ -252,11 +252,17 @@
 
     <j:set var="directory" value="${maven.repo.central.directory}/${groupId}/jars/" />
     <repository:copy from="${artifact}" toFileOrDir="${directory}" />
+
+    <u:file name="${artifact}" var="artifactFile"/>
+    <j:set var="artifactName">${artifactFile.canonicalFile.name}</j:set>
+
     <j:set var="command" value="cd ${directory}"/>
-    <j:set var="command" value="${command};ln -sf ${artifact} ${artifactId}-SNAPSHOT.jar"/>
+    <j:set var="command" value="${command};md5sum ${artifactName} | sed 's/ .*$//' > ${artifactName}.md5" />
+    <j:set var="command" value="${command};ln -sf ${artifactName} ${artifactId}-SNAPSHOT.jar"/>
+    <j:set var="command" value="${command};ln -sf ${artifactName}.md5 ${artifactId}-SNAPSHOT.jar.md5"/>
     <j:set var="command" value="${command};echo ${snapshotVersion} > ${artifactId}-snapshot-version"/>
     <j:set var="command" value="${command};chmod g+w *"/>
-    <j:set var="command" value="${command};chgrp maven *"/>
+    <j:set var="command" value="${command};chgrp ${maven.repository.group} *"/>
     <echo>Executing '${command}' remotely</echo>
     <repository:exec command="${command}" />
   </goal>
diff --git a/repository/plugin.properties b/repository/plugin.properties
index f8d1de11..d2eb57f4 100644
--- a/repository/plugin.properties
+++ b/repository/plugin.properties
@@ -1,3 +1,4 @@
 # -------------------------------------------------------------------
 # P L U G I N  P R O P E R I E S
 # -------------------------------------------------------------------
+maven.repository.group=maven
\ No newline at end of file