Question : sql server 2000 and 2005 - side by side

i installed a 2000 default instance.
can i install a 2005 default instance also or do i have to install a named instance of the second install of 2005.  

i am unclear how to put both engines on  the same node.

Answer : sql server 2000 and 2005 - side by side

you have to install a named dinstance