program with gedcom.pm help

I am using gedcom.pm to create a simple gedcom editing program. it's
basically a thin layer to allow a user access to gedcom files. I am having some
problems though and was wondering if anybody out there could help.

how do I automatically find out if I can have multiple items. IE I can have
many FAMS tags but only one SEX tag. I have tried using $record->max but
that always fails as an invalid call.

how do I properly link external documents to SOUR. I have a gedcom file that
was created with PAF that shows
1   OBJE hello
2     FORM png
2     FILE page1.png
2     NOTE some description
but gedcom.pm says that form, file and note are not valid tags for obje. is
there a different way? sample code maybe?

how do I setup the CONT tag? if I add a note it just goes on a single line.
This probably leads to another point of confusion I have. It looks like some
tags (NOTE,PLAC) allow data to be put to them and have sub tags. is there a
way to automatically recognize this?

Thanks in advance.
Nate

FYI once I have the program working I'm more than happy to share. :)