well I guess it doesn't take too much logic to figure out that it's a celeron, at least I thought it was quite obvious..
Anyway, find out which mobo you have (cpu-z will tell you this too) and then check if the mobo supports pentium 4 processors. Most likely it will, but it's best to make sure.
And yes, as long as you use a mobo that accepts ddr then you can use it.