Tango zip or external command line zip

[Lester L. Martin II]

Dear Community,
I am asking is Tango's zip ability enough to decompress its own zip package, dmd's and dsss's.  If not has anyone written a zip lib for D.
I would prefer to use a zip lib with commands like the following compared to tango's current zip. 
FastZip fz = new FastZip;
fz.Extract(filein,fileout,filter);
fz.Zip(dirin,fileout,filter);
If we don't have this would it be easier to at installation time download a command line zip utility and call it to unzip items.  
Which is easier?
Lester L. Martin II