[RndTbl] PATH problem

[author]

How do I make an entry to the Red Hat 7.1
system wide PATH ?
I've looked up /etc/profile and it doesn't look
like something that should be edited. Besides,
I can't see a typical PATH line to edit.
So I took a look at /root/.bash_profile and
it looks more like what I'm used to. But that's
only good for loggin in root and I don't always
do that.
I'm used to Slackware where all you have to
do is edit the /etc/profile file to add a program
to the system wide PATH.
What do I have to do in Red Hat 7.1 to add
something like /usr/local/Slab/effects  to the
PATH ?  And what file records the PATH?
  Any hints would be appreciated.