Alternate way to open .sit files under SL?

I think at some point in the past I had Stuffit Expander installed on my Leopard box. I suspect this because when I browse to a .sit file I still get the choice to 'open with stuffit expander'. If I select this choice I get a text edit file with a bunch of gibberish in it.

I don't want to reinstall Stuffit on my SL box. I remember Stuffit being really invasive and try to take over the unzipping of .zip files from the OS X archive utility, etc.

So, I have two questions;

1. Is there any other way to unpack .sit files?

2. Is there any way to clean out the last traces of my previous stuffit installation?

Thanks.