باشمهندس حسن الرجاء المساعدة

I have downloaded the premium studio 2009 and combined the files on 5 different filed but when i try to activate it it's not working as when i first select file no 1 and start to activate it asks for the 2nd disk so iit's not possible to select the 2nd file so please advise the steps required to carry out the same
thank's for your continuous support