[Haskell-beginners] Parsec 2 and Parsec 3

[John Velman]

I've just started picking up Haskell where I left off a couple years ago
when I switched from Linux to OS X (and some other things interfered with
continuing my Haskell projects).

I was using Parsec at the time -- must have been Parsec 2.

When I loaded HOC it seemed to depend on Parsec 3, so I installed Parsec 3.

Now -- suppose I want to use Parsec 2 for my own work.  

Is there a reasonably easy way to install Parsec 2 as, say Parsec2 and have
both?

Thanks,

John Velman