I'll help you but you have to do the work yourself, sorry unless you want to come to Scotland
I don't understand this one, You manage to send an email to a list so must be able to get on a computer. That is the first step, The next is you must buy a computer cable that connects to your synth.( Midi)
Take your pick
http://search.ebay.com/midi-cable_W0QQfkrZ1QQfromZR8
Now we have to be able to update your synth, If you want send me a link to the readme file for your update and I'll help you undertand what you need to do. But I'd think it should explain it itself. But if you really don't understand let me know when you can connect your synth to the PC via this very cheap cable
Software can be done with MIDI-OX usually or even if you set up windows media player it should do it.
If all you want is the new sounds mate it is very easy, if it is the new os then that shouldn't be that bad, even if it goes wrong many people here have done it all so you'll be safe.
You'll need to be able to get the midi connections first, even borrow your friends interface if they are willing.
Cheers
kris