The Iron Maiden's guitarist, Adrian Smith, has done an interview there are 5 years ago not only to promote the 'Brave New World' album, but also gave some guitar lesson. The videos are available here :
http://guitar.com/Misc/popplay.aspx?ParID=316
and
http://guitar.com/Misc/popplay.aspx?ParID=315
http://guitar.com/Misc/popplay.aspx?ParID=316
and
http://guitar.com/Misc/popplay.aspx?ParID=315
those links you gave didn`t work... something about cookies don`t really know what`s that
but... if you mean this guitar lessons http://youtube.com/watch?v=9wItsn3r_kc
...I know it.. I tryed some of his advices (I`m kinda of a guitar player too... I kinda suck ) ... and the worming-up tips ..are GREAT!!! really helped