Customizing My site under MOSS

Question

Hi Everyone,
I am planning to use My site link as a org chart, but I need to customize it to some extent.
basic things I am looking for are as follows:

1) Data entered by the different users should be approved by a moderator(Site Admin) before it's visible to others.
2) Site Admin?moderator should have access to update/edit any person's information, but once its changed the Site Admin, the affected person should get an e-mail notification
3) Is there a way I can add more fields and I can search a person by the skill sets?
4) I am planning to show a Org-Chart on the home page which will be read from the Active Directory, please let me know how can I do this..
By now you guys would have judged that I am not much into coding :)

Any help you guys can offer is highly appreciated.

Thanks
Chan