Problem with MSSQL Server 2005

Here is the picture: http://imgur.com/Hde0QQh

I am trying to re-install mySQL server 2005 and I keep getting lots of errors.

Is there any way to fully uninstall everything including the three instances that I made?

One more thing, I kinda fooled around with registry and now I get this: http://imgur.com/UClZUBa whenever I start two of three services related to SQL.

Thank you for your help in advance.