You will want to find a version of Stuffit w/Dropstuff. I know v6 will create a regular .sit. When you have dropstuff, you can simply drag and drop folders to make an archive.

That said, I personally prefer .tar.gz as it is universally accepted across the Mac OS, Mac OS X, and Linux/BSD world. (I'm not sure if versions of stuffit before 4 can untar/unzip them, so you will want to check ahead of time if you are archiving for very early versions of stuffit.)

Just an FYI:

Expander 5.0 contained many bugs, and its file format was not readable by the earlier version 4.5, leaving Mac users of the time without a viable compression utility.~wikipedia

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