Have a look in "man mount" for setgid and grpid. I use grpid in fstab for a partition where I want users to be group of new files.
EDIT: re read your post and you don't mention a partition so: you can set the group of a directory to say devel , and do chmod g+s dirname
After that new files in that dir should have devel as group.
Last edited by makuyl; 01-18-2005 at 01:00 PM.