For this style to work you need:

* Firefox
* 'Greasemonkey' extension for firefox
* 'Stylish' extension for firefox

After getting these do the following:
1: install this greasemonkey script (lastfm_xerion_layout.user.js) http://lastfm.xerionslair.org/scripts/lastfm_xerion_layout.user.js
2: install this style (only changes user pages) Old style last.fm - By Xerion
UPDATE:
3: also install this style: Old style last.fm (PART TWO) (it will change every other page except for user pages)

All credit for this style goes to the last.fm user Xerion, all i did was make it work on user profiles only (cause it was messing the rest of last.fm up) and uploading it here.