Lost terminal BASH commands

http://discussions.apple.com/forum.jspa?forumID=758&start=0
I found this topic above but believe it's assuming things that I do not know. Since I cannot reply to it, I'm starting another thread.
I've changed to bash using Netinfo but have lost the default commands.
Here is the contents of my .bash_profile:
. ~/.bashrc
ENV=$HOME/.bashrc
export ENV
Where would the default commands go?
Where would I place additional commands/applications?
thanx, sam

http://discussions.apple.com/thread.jspa?messageID=3511247&#3511247
is the link I meant to copy (thought I did that correctly)
By "default commands" I meant ls -al, etc.
/bin/echo $PATH yielded an older path to mysql.
When I emptied the file, I got the defaults:
/bin:/sbin:/usr/bin:/usr/sbin
which I now have gotten back, thank you.
Now my follow-up, is what is the structure to add more, say mysql, ruby, etc?
Is there a comment character that can work on a line basis?
Should I just separate all these with a colon?
Or just add as a separate line?
thanx, sam

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