Installing a zipped file

Hi everyone,

I have a question about installing wordpress, a friend of mine used have a website built using wordpress, the designer who designed his website did sign up for a hosting contract using his own email and info and then he stopped paying for the the monthly fees of the host and they took the website down and then that contract expired, but before all that to happen he took a backup and gave it to this friend of mine in a zipped file. It is a file containg the usual wordpress folders like Admin, Content and Includes and… Now I want to know if he buys a new host can he install everything using this zipped file? Like a bulk upload / install? Is there a plugin or another technical way to install the old website completely? He doesn’t want to loose his old website design / pages / theme…

Any suggestion or advice would be greatly appreciated.