I suggest to buy the ones that are smoked and cleared they look at lot better than the chrome ones---thats what I have.
but if you want to do the mod your self the link is below.
Go to this link http://www.fnsweet.com/garage/clears.shtml
I just did mine sunday and i love them. It wasnt hard as much as it was tedious. I just followed fnsweet's instructions and after i did one it was like i had done 30 the second one was easy. It will look bad after you clear it unless you get a bulb that doesnt look amber. I got the Silver Star 3157's they are bluish chrome when off and amber when lit. If you have any questions let me know. I put about $25 into the project including 15 for the bulbs which is a far cheaper alternative than buying a new set, plus i like to get my hands dirty and that feeling you get when YOU do something to YOUR car....