How to compile a service writen in C# ( .Net 2.0 ) , uninstall and reinstall too

The question may be simple to some but, I am not in a position to do trial and errors due to lack of a proper test environment.

This is someone else’s sourcecode we have inherited.
I have been given the task of recompiling ( afer some modifications ) and reinstall a newer version of a windows service that was written on .Net 2 C#

The current version of the service runs on a Windows 2003 Enterprise edition machine.

I need to do the following without a hitch - as the resulting deployment will go straight into the production - pls don’t ask me why no testing.

1. Compile the new code
2. Identify what parts I need to deploy - there is a ProjectInstaller.cs but does not seem to have much code - so I assume the previous people did a manual install ( see attached code for that )
3. Uninstall the currently running service
4. Install the new service

If you can provide some clear instructions , that would be much the better rather than me having to read article links.

Thanks very much,
InstallerCode.txt