Thank you, this work pretty exactly how I wanted it work.

The only issue I'm having now is that when I open the output script (with the CREATE LOGIN statements), MSSQL first asks me to select the encoding (which I set to 'auto-detect'), but when I try and run the script as whole, it does not complete, I have to run each statement individually, which isn't ideal.

Has this got anything to do with MSSQL asking in respect to the Encoding, which it wasn't doing so with the original script?