Hi Richard,
You need to use the ezEdit to input the LinkTo fiel value.
Also, this is how you should enter it;
http://YourServerHere/YourPageHere.aspx?ID=<%ID%>
The string <%ID%> will be replaced at runtime by the actual ID value of the item. Don't hardcode anything.
Also, please check the documentation for more details.\
If you want to see an application sample please use one of the templates that we distribute with our product. I'd recommend you to use CRM template since it has a similar scenario.