I have the same problem; I need to place RadToolTip controls inside a RadAjaxPanel. When I do this, the tooltip is shown correctly, but I get an error ("Two components with the same id '..' can't be added to the application.") on the next Ajax postback.
I found this thread and tried to implement the solution...but there is no EnableOutsideScripts property on the RadAjaxPanel.
I am using Prometheus 2007.3.1205.0.
(If you need an example, there is a brief web page below. It contains a wizard. The first step has a tooltip. View the tool tip and then click the Next button and you get the error.)
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server">
<asp:Wizard ID="Wizard1" runat="server" DisplaySideBar="False">
<WizardSteps>
<asp:WizardStep ID="WizardStep1" runat="server" title="Step 1">
<asp:Label runat="server" ID="Label1" Text="View Tooltip" />
</asp:WizardStep>
<asp:WizardStep ID="WizardStep2" runat="server" title="Step 2">
Now go back to previous tab.
</asp:WizardStep>
</WizardSteps>
</asp:Wizard>
<telerik:RadToolTip ID="RadToolTip1" runat="server" Skin="WebBlue"
TargetControlID="Label1" AutoCloseDelay="0"
ShowDelay="1000" EnableViewState="false" Visible="true" Position="BottomRight" >
This is the tooltip.
</telerik:RadToolTip>
</telerik:RadAjaxPanel>