It's fine that the default task DLL doesn't include comps for tasks on your server. The default DLL was more than likely built against a SMP with not many solutions installed.
When you run the Task generator, there should be 2 steps: in the first step, you run the generator against the SMP to collect the tasks on your server. The second step begins when you have collected all the definitions and you pick "Adjeust Definitions". In this page you capture all the components you want to replace in your Task library (usually I just do a Select All). Unsure if you're actually doing this based on your posts... but where exactly are you getting your generator error.
Also, to remove libs from your project, when the project is open, right click on the project in the Designer treeview and click properties. Go to the Libraries tab... this is where you can remove libs from your project (like the generated task lib).