Umask? Setting Default File Permissions

In the standard Mac OS X Lion install, newly created files get the following permissions:
Owner -> Read & Write
Group -> Read only
Everyone -> Read only.
I'd like the permissions on newly created files to be this instead:
Owner -> Read & Write
Group -> Read & Write
Everyone -> No Access
I can change the permissions for each new file manually (using Get Info), but believe there must be an easier way. Perhaps by changing some under the hood default setting or via other programming? I've been led to believe that changing the umask might be the solution, but have no expierence with doing this or otherwise messing with umask.
Any help/guidance is greatly appreceated.

Use at your own risk...Your milage may vary...You have been warned...Don't blame me...This is a disclaimer...etc.
I believe I have the answer to my own question. Solution is to change the umask for user applications. Outline:
Use a file editor in Terminal to create a file called "launchd-user.conf" in the etc folder of the root directory (i.e., file is: /etc/launchd-user.conf).
add a line in that file to read: umask 007
Now files created by ALL users will have 660 or -rw-rw----- permissions (that's four dashes at the end; 1 dash for the execute on group and 3 dashes for read, write, and execute on others). That is:
Owner -> Read & Write
Group -> Read & Write
Everyone -> No access
Other permissions can be set as default by changing the umask 007 line to read umask nnn (where each n is a number between 0 and 7). See further below for helpful references on octal notation and use of umask.
Solution above is from Apple article and carries all kinds of warnings. See here:
http://support.apple.com/kb/HT2202
I had hoped that new folders would get 770 or drwxrwx--- permissions (that's three dashes at the end), but it doesn't seem to work for new folders created by the Finder. Instead they get 750 or drwxr-x--- permissions (that's three dashes at the end) if created by Finder and 755 or drwxr-xr-x permissions if created by TextEdit (and other applications?).
Other potential solutions (that I've not looked into): Get TinkerTool System Release 2 and work in what the developer calls the "Pane System."
Helpful article (not by Apple) on octal notation:
http://en.wikipedia.org/wiki/File_system_permissions#Octal_notation
Helpful article (not by Apple) on use of umask:
http://www.cyberciti.biz/tips/understanding-linux-unix-umask-value-usage.html

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This might be a bit more an OS X question than an Aperture question, but perhaps asking this here might help other people with similar case.
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