Signal2Noise
Headphoneus Supremus
.. Also a lot of posts saying you have to download apk. files etc. Is this a simple job for a bit of a technophobe like me?
It's fairly easy to download and install apk files. The alternate solution is to use custom firmware such as Lurker0's mod. This will provide you with the Google Play Store as well as other beneficial features. Follow the instructions and it's a simple process to get up and running. You can find all the info in this thread with a quick search.