I hate to point out the bleedin' obvious, but why on Earth would you have a QA environment that is different from your production environment?? Isn't the point of a QA/test env that it replicates as closely as possible the prod env? the only differences really should be possibly at hardware level where your QA server only has (e.g.) 32 Gb of memory whilst your prod server has 128 ....

Licence-wise, it makes makes no difference really .. you have obviously acquired a 2008 licence, this ought to give you the right to install 2005 on the machine currently hosting your QA 2008 env ... my advice (unrelated to your actual question :hehe:) is to quickly get 2005 on your QA server ... so that next time you develop something on 2008 and you want to see if it works in 2005, you won't have to wait until it hits the prod server 😎

B - I had a spare tuppence - L