Why we use mini image unless cracks?

[BarryB]

One reason is a mini-image may work with future patches, so avoiding the need to crack the update! Full images will probably work for all updates as it will contain all the data/copy protection.

Cracks are better, but due to some sceners getting bust many of the crackers have disappeared/retired, so the cracking pool is very small and so that's why there are few 'real' cracks around!

You just have to live with current situation and either use the methods created by other groups to play a backup, or just use your original disc!