take your time. clean all parts, rust treat the metal with a brush-on or spray and even spray paint before install. if it looks good before it goes on you'll be even prouder of the install.
clean all metal to metal surfaces to ensure no rocks/crud in between during install and this will go on easily.

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S