Hi,
I *always* have a copy of my whole Workbench partition in a drawer called WB-Backup in my Work partition. I use DirectoryOpus 4 for creating this drawer and copying all the files into it (no need for 'Show All....' etc). It can also do all the zipping and unzipping you want although LHA is my preferred archive.
Here is a screenshot but I'm sure someone will be able give you a link to where you can download it :-)

EDIT - Actually, after a quick search it looks like you can get it
HERE :pint: