relating / linking 2 documents to a master document

Hi,

I have the following scenario at a customer site and need your help.

Doc 1 is the parent document. Docs 2 and 3 are childs (related to it in their content). 2 and 3 are already uploaded and indexed. They already have an internal path. When Doc 1 is uploaded, I'd like to have a metadata link field that has a browsing UI to

point and select Doc 1.

Then, again, select Doc 2.

Now, once done,

When looking at Doc 1's properties it will have 2 links and will make

doc 2 and 3 just a click away.

the metadata fields does have a URL type field but it does not give

any browsing UI...

Thanks,

Tuval