Can python (CPython) and IPython coexist normally on the same computer ?

[scoop]

I know I could just try to install it and see, but I've got my
configuration just right, so I don't want to mess it up (maybe) with
IPython.

Also, can someone please point me to some page where I can find
differences between C and I Python. I'm learning Python using
"Learning python" (figures :), so I was wondering - what are the
practical differences between the two ? If I start with IPython, will
I be able to switch to CPython later, or will I have trouble with that
? Does IPython supports standard libraries like numpy and matplotlib ?

Greetings to all of you who actually read all of this, and got this
far :)
Hope all is well,
   Scoop