Frustrated and needs help

[Ry]

I want to make a backup of my Tony Hawk Pro Skater 3 so I used the rip kit provided in this site. I used Isobuster to extract the dvd onto my harddrive and I zipped the rip kit files into my Tony Hawk Pro Skater 3 directory. I then ran bat 1,2,3 like the readme txt says. However, the file size is still over 700mb. Is there something that I have to do after this. Also it says to used cdrwin to burn it on a cd. Can I use fireburner instead and if I can....how? Will somebody please help??
Thanks A lot!