VS 2010 - Support Login To Specific Users Account Via Admin Account

I have a web app Which Uses Forms Authentication.

One thing that we want to be able to do on Support is login to a specific users account Via our admin account.

We are using the standard asp.net membership authentication.

The idea would be for the support technition to be able to login using credentials like admin(<Troubled User>) using the Admin Account password

We are using a a Standard ASP.Login Control

The real Issue is that the Me.Page.User.Identity.Name is set to the value on the CtlLogin.Username Property. I need it to be the the Support Login?

Login Control

Code:
<asp:Login ID="ctlLogin" runat="server" DisplayRememberMe="False" Font-Names="Arial Rounded MT Bold" Font-Size="12pt" ForeColor="Black"
MembershipProvider="MembershipProvider" Width="100%" TitleText="" UserNameLabelText="User" VisibleWhenLoggedIn="False" RememberMeSet="True"
PasswordLabelText="Password" EnableTheming="False" Height="35px" >

[Code] ....

Validate User Script

Code:
Dim objstrSupUser As String = ""
'Load the user from the membership provider
Dim strUserName As String = ctlLogin.UserName
If ctlLogin.UserName.IndexOf("(") > 0 Then
objstrSupUser = Regex.Match(strUserName, "(([^)]*))").Groups(1).Value

[Code] ....