[AccessD] Acrobat 8 Standard opens instead of Acrobat 7 Reader

I have a client who uses my system to sometimes open acrobat files (via
hyperlink).  Both Reader 7.0 and Standard 8.0 are on his PC.  He has set an
option in Standard to normally have files open in Reader.  But when he opens
using my system the file will open in Standard.  

Is there a way I can do something about this?  Perhaps open Reader first and
then the file?

Thanks!
Dan