Unfortunately, that's not possible. Those Optimization Reports are "canned" and while you can change certain things about them (via the Reports...Optimization Reports Settings menu), you can't have them use any of your custom scenarios.
Senior Consultant PSO
Thanks for the reply Toby. Enjoy the day, -Jeff
You cannot choose a custom scenario for your report, but you can modify the default scenario to your liking.
You can choose two custom Scenarios you want at "Assessment" => "Assessment Tools" => "Assessment Global Settings" => "Scenario and Hardware Selection" in the company that your account is created in.
This could be confusing but you could not change the setting at the company you are working on, the setting need to be changed at the company your account is created.
Another important note: the settings will take effect for only the new companies you will be creating. It'd not take effect on the already created companies. For the already created companies, you can modify the scenario like in patrickds post above.