The other day I installed SQL Server but I had a little trouble getting Reporting Services installed because I didn’t meet the requirements.
I’ve installed Reporting Services a few times in the past on XP. So before I even started I installed IIS. To do so, go to Control Panel > Programs. From there you can click “Turn Windows features on or off”. You’ll get a little pop-up with a list of features. I later learned that just choosing Internet Information Services (and the sub topic World Wide Web Services) is not enough. I know this because that is all I did and Reporting Services would not install! Luckily I found this article at support.microsoft.com. I had to go back and choose some extra features of IIS that did not get installed by default. The article explains the whole thing, but this picture should make it easy to see which features need to be enabled.
Yes, it is a small picture but click it so see it full size!
After making these changes, Reporting Services installed in a snap. Good luck.