diff --git a/README.md b/README.md
index 68da73b2..827e27ef 100644
--- a/README.md
+++ b/README.md
@@ -18,8 +18,16 @@ mkdir build
 cd build
 set RISCV=/cad/riscv/gcc/bin   (or whatever your path is)
 ../configure --prefix=$RISCV
-make
+make (this will take a while to build SPIKE)
 sudo make install
+cd ../../riscv-arch-test
+cp ../riscv-isa-sim/arch_test_target/spike/Makefile.include .
+edit Makefile.include
+  change line with TARGETDIR to /home/harris/test/riscv-wally/addins/riscv-isa-sim/arch_test_target (or whatever your path is) ***fix
+  add line export RISCV_PREFIX = riscv64-unknown-elf-  # this might not be needed if you have 32-bit versions of the riscv gcc compiler built separately
+make
+make XLEN=32
+exe2memfile.pl work/*/*/*.elf  # converts ELF files to a format that can be read by Modelsim
 ```
 
 Notes: