[Zope] Java Applet?? - File compression and upload

[chpeer2002]

problem:
Client side: 5 files should be found automatically, then be displayed 
in order to be accepted by the user, then they should be compressed 
to a gz-File and afterwards uploaded to a server.

1)Does it make sense to use a Java Applet?
2)Java Applets and DTML?
3)Could you describe me a way how to solve this problem?

Thanks for any help!
Chris