Updated GAMESS docs for USERSCR and SCR locations

mkdocs-project-dir/docs/Software_Guides/Other_Software.md

@@ -342,7 +342,12 @@ recon-all -openmp $NSLOTS -i sample-001.nii.gz -s bert -all
 
 The General Atomic and Molecular Electronic Structure System (GAMESS) is a general ab initio quantum chemistry package. 
 
-The GAMESS module should be loaded once from a login node before submitting a job - this creates the `~/Scratch/gamess` directory for you which is used as `USERSCR` to write some scratch files during the job. If you don't want to keep these files and would prefer them to be written to `$TMPDIR` instead, you can put `export GAMESS_USERSCR=$TMPDIR` in your jobscript after the module load command.
+The GAMESS module should be loaded once from a login node before submitting a job - this creates the `~/Scratch/gamess/randomLabel` directory for you which is used as `USERSCR` to write some scratch files during the job. If you don't want to keep these files and would prefer them to be written to `$TMPDIR` instead, you can put `export GAMESS_USERSCR=$TMPDIR` in your jobscript after the module load command.
+
+It will also check whether this is a cluster with `$TMPDIR` available, and set `SCR` which is the 
+binary scratch directory to `$TMPDIR` if it exists and `~/Scratch/gamess/scr.randomLabel` if it
+does not. You can also override this by adding `export GAMESS_SCR=` to any path you want it to use
+in your jobscript after the module load command.
 
 ```
 module unload compilers mpi
@@ -351,7 +356,7 @@ module load mpi/intel/2015/update3/intel
 module load gamess/5Dec2014_R1/intel-2015-update2
 
 # Optional: set where the USERSCR files go. 
-# By default, the module sets it to ~/Scratch/gamess
+# By default, the module sets it to ~/Scratch/gamess/randomLabel
 export GAMESS_USERSCR=$TMPDIR
 
 rungms exam01.inp 00 $NSLOTS $(ppn)