The major difficulty in sharing files like this is to get the permissions right. This process is simply automated for both Windows and Linux users.
Unix (Solaris or Linux) users can connect to the directory directly,
% cd /res/users/username/grants
After editing/adding files there, the command
% /usr/local/bin/fix-shared-grants-files
will set shared protections right.
Users on Windows boxes need to map the directory to their machine first. When finished editing/adding files, they should run a program in the grants directory called "Share files (username) .bat" (where username is their user name). That program will ask for their (Unix) password, then ssh a command to research to correct the protections.