diff --git a/docs/list_of_requirements.png b/docs/list_of_requirements.png
deleted file mode 100644
index 9468aae..0000000
Binary files a/docs/list_of_requirements.png and /dev/null differ
diff --git a/glidein_start.sh b/glidein_start.sh
index be7c3a7..33291fd 100755
--- a/glidein_start.sh
+++ b/glidein_start.sh
@@ -114,11 +114,20 @@ export _condor_UPDATE_COLLECTOR_WITH_TCP="True"
 export _campusfactory_CAMPUSFACTORY_LOCATION=$PWD
 export _condor_USER_JOB_WRAPPER=$PWD/user_job_wrapper.sh
 
-if [ ! -e $GLIDEIN_DIR/glidein.tar.gz ]; then
-  wget -nv http://prod-exe.icecube.wisc.edu/glidein.tar.gz
-  GLIDEIN_DIR=$PWD
+# detect CVMFS and get the OS type
+OS_ARCH="RHEL_6_x86_64"
+. $GLIDEIN_DIR/os_arch.sh
+
+if [ -e $GLIDEIN_DIR/glidein.tar.gz ]; then
+  tar xzf $GLIDEIN_DIR/glidein.tar.gz
+else
+  if wget -nv http://prod-exe.icecube.wisc.edu/glidein-$OS_ARCH.tar.gz ; then
+    tar xzf glidein-$OS_ARCH.tar.gz
+  else
+    wget -nv http://prod-exe.icecube.wisc.edu/glidein.tar.gz
+    tar xzf glidein.tar.gz
+  fi
 fi
-tar xzf $GLIDEIN_DIR/glidein.tar.gz
 
 export campus_factory_dir=$PWD
 
diff --git a/submit.py b/submit.py
index 52cdc46..f4c3ef5 100755
--- a/submit.py
+++ b/submit.py
@@ -182,9 +182,12 @@ def write_glidein_part(self, f, local_dir=None, glidein_tarball=None,
             glidein_loc = os.getcwd()
         if glidein_tarball:
             self.write_line(f, 'ln -fs %s %s' % (glidein_tarball, os.path.basename(glidein_tarball)))
-        self.write_line(f, 'ln -fs %s %s' % (os.path.join(glidein_loc, glidein_script), glidein_script))
         if not os.path.isfile(os.path.join(glidein_loc, glidein_script)):
             raise Exception("glidein_script %s does not exist!"%os.path.join(glidein_loc, glidein_script))
+        self.write_line(f, 'ln -fs %s %s' % (os.path.join(glidein_loc, glidein_script), glidein_script))
+        if not os.path.isfile(os.path.join(glidein_loc, 'os_arch.sh')):
+            raise Exception("%s does not exist!"%os.path.join(glidein_loc, 'os_arch.sh'))
+        self.write_line(f, 'ln -fs %s %s' % (os.path.join(glidein_loc, 'os_arch.sh'), 'os_arch.sh'))
 
         f.write('env -i CPUS=$CPUS GPUS=$GPUS MEMORY=$MEMORY DISK=$DISK WALLTIME=$WALLTIME ')
         if 'site' in self.config['Glidein']:
@@ -597,6 +600,10 @@ def make_submit_file(self, filename, env_wrapper, state, group_jobs):
             if not os.path.isfile(glidein_script):
                 raise Exception("no glidein_script provided")
             infiles.append(glidein_script)
+            osarch_script = os.path.join(os.path.dirname(glidein_script),'os_arch.sh')
+            if not os.path.isfile(osarch_script):
+                raise Exception("os_arch.sh not found")
+            infiles.append(osarch_script)
             if "tarball" in self.config["Glidein"]:
                 if not os.path.isfile(self.config["Glidein"]["tarball"]):
                     raise Exception("provided tarball does not exist")