How do you change your windows? I have my Windows XP CD, what should i do with it to change my Windows?

i bought it (my XP PROFESSIONAL SP2 CD) and now what do i do, to change from XP HOME, to XP PROFESSIONAL SP2?How do you change your windows? I have my Windows XP CD, what should i do with it to change my Windows?
insert the cd, click on install... follow directionsHow do you change your windows? I have my Windows XP CD, what should i do with it to change my Windows?
boot it with the cd



and follow the instructions
All you need to do is pop in the disc, and follow the directions. Make sure you have the security code for the disc first. Without this, it may block all access. If you have high speed internet connection when you put in the CD, you can even look for updates. But all you need is to put in the CD and follow the directions.