Do you use a registry cleaner with Windows 7?

Hello, I just moved to Windows 7 64 from XP... I used to clean the regystry every week with XP, Should I install a registry program to use with Windows 7 64? Which one do you recommend?

Also, I just installed CCleaner. Any other maintainance program that u think is useful for windows 7?

Should I defrag the computer with the Windows defragger or should I download one by myself?

I use the registry cleaner in CCleaner - Seems to work very well. For defraging I like PerfectDisk - It costs $30, but you can try it for 30 days for free to see if you like it

I use Ccleaner but that is all... It is a fantastic little program and I haven't ever seen if cause a single problem.