Question : How can I modify the contents/layout of a MySite page in SharePoint?

I have a SharePoint intranet site that was originally set up by a consultant that is no longer available.  Bear with me as I describe this question.

How can I modify the contents/layout of a MySite page in SharePoint?

Specifically, the URL for our MySite page that comes up is:
http://moss.fg.com/mysite/Person.aspx?accountname=xxx

I have been told that in order to change the aspx program, I need to go to this address:
C:\Program Files\Microsoft Shared\web server extensions\12\Template\SiteTempltes\SPSMSITE

The only two aspx pages there are default.aspx and public.aspx.  There is a person.aspx in a SPSMSITEHOST directory  so I figured that was a special location set up by this consultant to handle our MySite needs.

However, when I try to edit this person.aspx page (right-click to bring up Sharepoint Designer), I ge the following error message:
Master Page Error
The Master Page file '~masterurl/default.master' cannot be loaded.
'Attach a different master page' (link) or coorect the problem in 'Code View' (link).

The line of source code that is causing this problem is obviously th following:
<%@ Page language="C#" MasterPageFile="~masterurl/default.master"      Inherits="Microsoft.SharePoint.Portal.WebControls.MySitePublicWebPartPage,Microsoft.SharePoint.Portal,Version=12.0.0.0,Culture=neutral,PublicKeyToken=71e9bce111e9429c" %>

Am I trying to open this page the wrong way -or- is there a better way to go about trying to modify the layout of the MySite page?

Answer : How can I modify the contents/layout of a MySite page in SharePoint?

How would you like to modify it? Do you know if any of the pages have been modified before?

You can try to go to a personal site and find Pages library. Pick a page and edit with SPD from there.

Thanks.