On IIS application pool settings there is a RA action to change the Identity "IIS - Edit Application Pool Identity" but what about other settings on the Application Pool? For example, how would I change the Application Pool parameter LoadUserProfile from "False" to "True"?
If there are any actions you would like to perform within your IIS environment that are not included within the RA IIS action pack, the action pack has a catch all action included. This action is "IIS - Run Appcmd", which allows you to run commands with the built-in Microsoft AppCmd.exe tool which is used to manage IIS 7 and above.
The Microsoft AppCmd.exe documentation linked below can be used to help construct the necessary commands to run for the actions you wish to perform.