Planet Minecraft!

I joined yesterday, and I already love it! I have made 6 skins already, 2 lab coats, female and male, and 4 doctors, 2 male, one with a a mask and one without a mask. The other two are female doctors, one with a mask and one without one. That totals 2 lab coats, 4 doctors, and 6 in total (Yeah sometimes I'm so captain obvious. But I'm extremely excited!).

On the negative side, my minecraft got f*cked up and is so laggy I can't do anything. I tried installing finitewater, it was for 1.5_01, I must have installed it incorrectly.
If anyone has bumped into this problem, PLEASE tell me how to fix it I want to start playing minecraft again! Thanks!