if you follow the steps you will start with
this and end up with this

step 1 - install firefox if you haven't already

step 2 - install Stylish

step 3 - go here and press the "load into stylish" button (and then "save")

edit: if you get the "Bandwidth Limit Exceeded" error you can find instructions how to complete the step here

now your profile page (all profile pages actually) should look like this

if you're happy with it,you can leave it this way
but if you want to get rid of some useless shit...

step 3 - install Remove It Permanently

step 4 - install Aardvark

you need to restart firefox before the next step

step 5 - go to your profile page and right click anywhere
press "start aardvark"
now,simply put your mouse like this and press k to remove the stupid fucking library

(another way to remove the library: tools->add-ons->extensions tab->double click on "Stylish"-> double click on "Last.fm Paint It Black, v.2 Mod Dark-Grey/Olive" and add the following at the end-> #taste { display:none; } )

using the same technique remove all the useless shit you want
(like the flash player for example - you will need to press k two times - the first one to remove the player itself and the second one to remove the empty space left)

when you're done,press q

you can make these changes to affect all the profile pages in last.fm,not just yours,by tweaking the Remove It Permanently options (right click anywhere -> RIP advanced) before step 5

step 6 - expand your top artist list to include 50 artists
simply press this button -> settings -> number of artists 50 -> make it so

do the same for the top tracks chart,if you want


hope this was helpful