Just a quick update.
My memory arrived for my routers and I finally managed to get round to installing it and testing it with version 15.1 IOS this weekend. So now all good, I have 4 x 1841s in total running IOS 15.1T with 64MB flash cards. Trying to find the time to study is proving a lot more difficult than expected so I am trying to spend every spare minute studying. I have been spending time on the train to work watching training videos which explain things well. For the time being I have mapped out some critical topics on my study schedule such as Multicast, MPLS, BGP and QoS that I need to set some time aside to learn and will focus on those for the days scheduled and in between I will just recap on other topics. I have also just purchased a few of books off the recommended reading list for the CCIE R&S – managed to get some really good second hand deals (all hardback books) off Amazon, one book I even managed to pick up for £1.20 so waiting for those to arrive.