while installing visual studio 2005 do we need to register each time.

do we need to register everytime we install in different machine or is it enough for me to register once in one machine and then by using the same registration can i generate new registration key so as to install visual studio 2005 in multiple machine.. kindly please help me.

Visual Studio Express Editions30

You will have to generate a new registration key on the other machine. From the Registration FAQ:

"Registration keys are only valid on the machine from which registration was completed. You must click the product registration link and obtain a unique registration key for each computer running an Express Edition. Each Express Edition requires a unique registration key. For example, if you want to register both Visual C# Express and Visual Web Developer Express, you will need two registration keys."

Hope this helps!