Burned backup copies run extremely slow

Hello,

I just made backup copies of Doom 3, Half-Life 2, and Warhammer. The installer comes up just fine, but when it starts installing, it takes FOREVER. It is almost like the transfer speed of this disc is like 2x, but it is actually 48x. This is the same way with all three of these games. I have made backups of my other games such as AOEIII and they worked fine.

Why would it being doing this and how can I fix it? Thanks.

bump

May I ask what program you are using?