Manually create an option tree

The Manual Way:
- Often it is easiest to create an option tree manually. This provides more flexibility than is available with OPTION/CREATE.
  1. Make the directory structure required. It may look like this:
```
/home/student/myopt123
  +- nxm
      +- myopt
           +- cfg
           +- prim
           +- mcr
           +-  :
```
    You do not need to include any directories you don't intend to use.
  2. Copy the template commands.cnf file from $NMROOT/nxm/sys/cfg/commands.template and place it in the cfg area of your new option tree.
  3. Use the OPTION command to tell NeXtMidas where the option tree is located.
```
nM> option myopt /home/student/myopt123/nxm/myopt
```
  4. That's it.