Launch Application From Windows Service

I've created a windows service using VB.NET, the service monitors the users actions and should lanuch an application if particular set of conditions have been meet. The problem I'm having is the launch of the windows application from the service. I found an explaination to my problem in MSDN "Process created by the service cannot display a user Interface". I think if I start a new process/thread as the current user not the service I should be able to start my application. My problem...How do you create a new process/thread as the current user?

If anyone has a solution or idea I would greatly appreciate it. Thanks

This creates new thread and run specified job :

VB Code:

Imports System.Threading
 
Dim thread1 As Thread
    Dim start As Diagnostics.Process
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        thread()
    End Sub
    Public Sub thread()
        thread1 = New Thread(AddressOf RunMyapp)
        thread1.Start()
    End Sub
 
    Public Sub RunMyapp()
        Dim str As String = "C:\readme.txt"
        start = New Diagnostics.Process()
        start.Start(str)
    End Sub