first get the profiler Exe from: http://expressprofiler.codeplex.com
then you can add it simply to the Management studio:
Tools -> External tools... ->
a- locate the exe file on your disk (If installed, it's typically C:\Program Files (x86)\ExpressProfiler\ExpressProfiler.exe)
b- give it a name e.g. Express Profiler
that's it :) you have your Profiler with your sql express edition
