iomega zipcd, good,bad,horrible?

[Rogue5]

i have an iomega zipcd rw drive (as the title indicates) and i was wondering if it is a poor burner or what, because i have trouble copying many games, i have recently tried nhl 2001, hitman, and tiberian sun, with clone cd and nero, to no avail. i haven't tried many others, but i am hoping it is just these games, and not all i would try to copy.
as for nhl 2001, if i wanted to copy it using clone cd, what settings would be best, because i can't get it to copy an image, and have tried a couple different settings, but was wondering which would be best.
thanks