Thanks for the initial help. I have now got a clear picture of what to do. The requirement goes like this.

Test environment - We have 15 user databases to be migrated from SQL server 2005 to SQL server 2008 R2 on a different machine.

The plan is basically to use the concept of mirroring and do the activity (This is cos at the later point of time same has to be implemented on production box which is having 500 Db's)

I have never configured mirroring too :(.. Can any one please help how to begin with..