There are 3 tiers to Task Server:
Installing Task Server on a Site Server (other than the NS)
This process is generally used to correct an issue where the task server had to be removed and re-added. Under these circumstances, because the CTS is a run-once-asap package, it doesn't run again, leaving the installation to a manual process. It can also be used to repair problem installations. The installation is executed from the NSCap\bin\Win32\x86\Client Task Management\Server Package folder on the NS (or an equivalent package folder) and is called "TaskServerSetup.exe".
Installing Task Server on the NS
Here, the instructions are a little different, and you have to check several files to ensure everything is pointing the right direction. This is especially true if the NS's agent has been moved.
Client Task Server Installation Process
Client Task Server (CTS) Complete Removal
NS Agent Reinstallation
The process of reinstalling the agent on the NS (or really any task server) is a bit different than on other clients, mostly because we need to be in a hurry to get things done, and policies are never in a hurry! And, Task Servers need to be installed manually in the middle of the process, but can't run while another install is running. Accordingly, to get it done fastest, we recommend something like this:
Other items of note: