Newbie post - replacement key help?!!

I'll start with a hello - I'm Gemma, just new to the forum, came across a thread from a google search and I'm really hoping someone here can help...

I saw an old thread (from a couple of years ago) about replacement keys and I was wondering if anyone could help me out?

I have an '03 plate Kia Rio, and I have lost my key. I'm really not keen on forking out around £300 for a new one from a dealer! I have been looking online (my boyfriend suggested) and I've found this key that I think might be part way to me getting this sorted:

I understand that the transponder will need to be programmed - how do I go about doing this? I have one other key, but I share the car with a friend. I would be able to use their key for their sake of getting the key cut, but I'm not really in a position where I can send it off anyway as my friend will need to use the car (I actually don't drive it that much).

I have checked with a couple of key cutting shops in my area and they would be able to cut the key for me, but not programme the transponder. I don't need a remote locking key as this has never worked since I had the car so I'm not fussed about it.

Any help would be greatfully received! Although I don't use the car much I am hardly using it at all at the moment...