diff --git a/sims/switch-vortex.sh b/sims/switch-vortex.sh
new file mode 100755
index 00000000..2cbc3016
--- /dev/null
+++ b/sims/switch-vortex.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+
+if [ $# -ne 1 ]; then
+    echo "usage: $0 kernelname"
+    exit 1
+fi
+KERNEL=$1
+
+SCRIPT_DIR="$( cd "$( dirname "$0" )" && pwd )"
+cd $SCRIPT_DIR
+
+if ! [ -f "args.bin.$KERNEL" ]; then
+    echo "error: args.bin.$KERNEL not found"
+    exit 1
+fi
+
+cp -Pv args.bin{.$KERNEL,}
+cp -Pv op_a.bin{.$KERNEL,}
+cp -Pv op_b.bin{.$KERNEL,}
diff --git a/sims/vcs/run-radiance.sh b/sims/vcs/run-radiance.sh
new file mode 100755
index 00000000..75c32fa2
--- /dev/null
+++ b/sims/vcs/run-radiance.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+set -ex
+
+if [ $# -ne 2 ]; then
+    echo "usage: $0 config kernelname"
+    exit 1
+fi
+CONFIG=$1
+KERNEL=$2
+
+if ! diff ../args.bin ../args.bin.$KERNEL; then
+    echo 'args.bin changed, running make clean'
+    make CONFIG=$CONFIG clean
+fi
+
+../switch-vortex.sh $KERNEL
+
+ls -lh ../args.bin
+ls -lh ../op_a.bin
+ls -lh ../op_b.bin
+
+make run-binary-debug CONFIG=$CONFIG BINARY=/scratch/hansung/src/vortex2/tests/opencl/$KERNEL/$KERNEL.bin.elf LOADMEM=1