Is it possible to upload files to Zohodocs  using the file upload tool in ZC ?

Requirement / Issue 

File upload replaces the existing doc 

-- No, we dont want to replace the doc

-- we want to add / append docs to THE  record in ZC

On the same note,

If ZDocs is not possible, Can we use Dropbox / googledocs / via ZCreator's file upload

& view the list of docs in the record's [detailed] view