sudo chmod -R 0777 /home/myuser/Documents
sudo chown -R nobody:nogroup /home/myuser/Documents

sudo apt-get install samba
sudo nano /etc/samba/smb.conf

# put this at the bottom of the file with spaces indicated below
[Documents]
   path = /home/myuser/Documents
   browsable = yes
   writable = yes
   guest ok = yes
   guest only = yes
   read only = no
   create mode = 0777
   directory mode = 0777
   force user = nobody

sudo service smbd restart

# on Debian
su
/etc/init.d/smbd restart