This is a really simple application I made last night / today to make merging your assemblies a little bit easier. Basically it's just ILMerge with a user interface to save having to remember command line args and stuff like that.
Very simple to use, select your main assembly ( main exe/dll ) and then decide what you want the resulting file to be called (don't need to add an extension by the way). After that you can just browse for your dependent assemblies and when you're ready, hit "Begin Merging" and wait for it to run.