Thanks, you've all been so very helpful and increased my understanding massively. You were right about SeTool2 Lite being version 1.10 even though the folder and link said v1.11. I actually looked in the top corner of the program window itself and saw 1.10.

Still a bit unsure about custpacks, but altogether know so much more now and have an unlocked phone. Next step is to put latest firmware on it.