You'll need a new memory stick or to format it with HDD guru low level format.
You also need to backup your line otherwise youll lose it. But woosh is very easy to install once you have their base build.
Webmaster at http://www.everydaytips.co.uk
I Don't think you can add a iptv line to the 2s. I could be wrong. Have a look around the forum,I'm sure this question has been asked. As for the memory stick,you should already have one or a HDD that's devoted to the box. This will store program guide and recordings and timeshift to rewind TV etc.
I suggest the new memory stick as for some people it's easier than low level format.
It's a better and easier practice to flash using the memory stick. Your box won't read your current one with flash files on until it's been low level formatted
Webmaster at http://www.everydaytips.co.uk