Create Alert for Sharepoint group or Ad Group

Hi,

I read many topics about my problem but i couldn't find an answer. 

Basically, i want to be able to create alterts to Sharepoint Group. Unfortunattely, this is not possible ?(Another Strange point of view from SP developper's).

So, at least i tought i could create alert to an AD-Group but is that possible only if you're using exchange ? 

I did this but the alert is sent  only to the email adress define with the group name :

1. Create the distribution list/group in Active Directory and assign an email address. Do not use any dashes "-" in the group name.
2. Edit the properties of the group to change its Group Type to Security (from Distribution). Make sure the group is a Universal group. Only security groups show up in SharePoint's address book. They show up as "domain groups" in SharePoint.
3. Give the domain group at least visitor permissions on the list that are you are creating the alerts for in SharePoint. Alerts won't be sent if the domain group doesn't have appropriate permissions.
4. Then setup the alert and use the address book to locate the domain group.
5. Test out your alerts. If you have "require approval" turned on for the list, make sure you approve the items so alerts will be sent.

I heard about Email - Enable but obviously i have to use exchange ?

Any help would be appreciated.

Thank you.