It doesnt work,cause the Ark zip backend,unzip,doesnt do multi-part zips, i
think. 
So,one must choose another one,or concatenate the zip parts,test it,
then unzip the
resulted archive: (cat archive1 archive2 newarchive)

p.s .Already sent one message,never showed up in here. 
hope this one is more lucky 
And yeah,my english is plain bad :)
edu