Pilfo,
First off let me tell you. Habing Dreamweaver is not all you need to set-up and run a site. Dreamweaver is great for site development, but there are other things that make dynamic actions (like forms) within sites work. You can't always do everything with one application.
What your provider is telling you is that they don't readily offer you scripts. You can get a form script from here:
http://www.scriptarchive.com/formmail.html
FormMail.pl is a mail script that you put into your cgi-bin which your form calls to process the information put into the fields. When someone clicks on the submit button, the form code on your html page calls the formmail script which compiles the information and sends it to the mail server to send to you.
When you download the script, open it in WordPad. The first line will be this line:
#!/usr/bin/perl
This is your path to the Perl application that allows Perl scripting to run on your server.
You will have to make some other script adjustments which are all in the top section of the FormMail script. One will be your path to the mail server which is this line:
/usr/sbin/sendmail -i -t
I believe default in the script you downloaded is ( /usr/lib/sendmail -i -t ) so you will have to change this. You also need to set your referrers and your recipients in the script. If you need help, just read the set-up page on the site above. This page also has the information you need to set-up the html form properly so it can call the script to send the info, make certain fields required, redirect after the field is filled out, etc.
When you load the script into your cgi-bin folder, you have the option to set specific permissions for the script. These permissions tell the server who can access the script and what they can do with it.
I personally use Dreamweaver but not for uploading files and changing permissions. For this I use CuteFTP. It is a free download you can get from downloads.com It has simple directions on uploading and setting permissions.
If you still have problems let us know.