
Just run the following command:

   packs protein.gro acetic.gro dmso.gro water.gro sodium.gro -prop [1:100:1000:1000:92] -it -bk

This will create:

   protein+acetic+dmso+water+sodium_mol2193.gro
   protein+acetic+dmso+water+sodium_mol2193.top
   protein+acetic+dmso+water+sodium_mol2193.zip

To visualize the simulation box, try:

   sview protein+acetic+dmso+water+sodium_mol2193.gro
   jmol protein+acetic+dmso+water+sodium_mol2193.gro
   vmd protein+acetic+dmso+water+sodium_mol2193.gro

To test the simulation box, try:

   mdrun protein+acetic+dmso+water+sodium_mol2193.gro -chk

