Me too. This is exactly what happened when i bought the symphonic orchestra activation and had to request a download link from steinberg!!!
as i understand iyoure buying an activbation link for the grand which should have been packaged as a trial in you cubase 6 box,
except i presume like me you upgraded to cubase 6 from 5 hence you have no grand trial installer. (or symthonic orchestra)
i had to be download a massive disc image off steinberg for the symphonic orchestra install as the version with cubase 5 was much older. the iso image the got me to download doesnt include a grand trial either tho.
bad form!