hi pelotica:
1) for the background of favorite links: use the stylehack created by Panda x http://stylehacks.deviantart.com/art/Favorite-Links-Gradient-101822134
After search: Explorer & Shell > Shell > CommonPlaces > Toolbar (you can add your own image or modify the gradient effect)
2) for the right part and top part of this background, you must see in your shellstyle: open it with a hex editor (restorator 2007 for example) and extray UIFILE.txt, and search <CommonPlacesHost (somewhere in middle)
<CommonPlacesHost
background="themeable(argb(255, 209, 215, 226), window)"
foreground="themeable(argb(255, 86, 86, 86), windowtext)"
padding="rect(0rp,0rp,5rp,0rp)"
also: search <if id="atom(ProperTreeLinksHeader)">
<if id="atom(ProperTreeLinksHeader)">
<Element
foreground="themeable(argb(255, 0, 0, 0), windowtext)"
background="themeable(argb(255, 209, 215, 226), window)"
padding="rect(9rp,9rp,0rp,7rp)"
font="gtf(textstyle, TEXT_BODYTEXT, 2)"
you must change background lign (in red) with your color
3) finally for the second background, in UIFILE.txt, search <style resid="propertreestyle">
<style resid="propertreestyle">
<ProperTreeModule
background="themeable(argb(255, 255, 255, 255), window)"
foreground="themeable(argb(255, 86, 86, 86), windowtext)"
/>
and search: <ProperTreeHost
<ProperTreeHost
fontsize="sysmetric(DSM_ICONFONTSIZE)"
fontweight="sysmetric(DSM_ICONFONTWEIGHT)"
fontstyle="sysmetric(DSM_ICONFONTSTYLE)"
fontface="sysmetricstr(DSMS_ICONFONTFACE)"
animation="rectangle|s|fast"
background="themeable(argb(255, 255, 255, 255), window)"
foreground="themeable(argb(255, 0, 0, 0), windowtext)"
padding="rect(0rp,0rp,5rp,0rp)"
and change background color
Save the modification with hex editor
