Question : How can execute an application asynchronously in a trigger/stored procedure?

I've written a trigger which I want to fire up an executable when it is run. Using at the moment:
@Cmd = C:\AppPath\App.exe -arguement1
xp master..xp_cmdshell @Cmd

The problem being that it seems to be waiting for the execution of the app to finish before continuing execution of the trigger - I just want it to execute it and then forget about it, and just carry on with its own tasks,.
How can i Do this?

SQL Server 2000 (8.0) running on windows server 2003.

Answer : How can execute an application asynchronously in a trigger/stored procedure?

xp_cmdShell is synchronous, but you can fool it if you make a simple application to start a process and then to exit. I did it the following way (in VB.Net 2005):
Create new Console Application project, name it StartProcess and copy the following code:

Module Module1
    Function Main(ByVal CmdArgs() As String) As Integer
        Dim myProcess As New Process, i As Integer
        If CmdArgs.Length = 0 Then Return -200
        Try
            myProcess.StartInfo.FileName = CmdArgs(0)
            For i = 1 To CmdArgs.Length - 1
                myProcess.StartInfo.Arguments = myProcess.StartInfo.Arguments & " " & CmdArgs(i)
            Next
            myProcess.StartInfo.CreateNoWindow = True
            myProcess.Start()
        Catch
            Return -100
        End Try
        Return 0
    End Function
End Module

Compile and copy exe to (for example) c:\
Test call from SQL:
EXEC xp_cmdshell 'c:\startprocess cmd /c c:\test.bat', no_output;
(my c:\test.bat was - just to last very long
dir c:\ /s > c:\zz.txt
exit)

Hope you'll find this info helpful.