It is technically possible to separate the screen and digitizer, but very difficult. If you search here you will find many people who destroyed either the screen/new digitizer/both in the process.
Repair shops usually only replace the complete assembly, for good reason.
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Note: This quote doesn't automatically apply to everyone, decide for yourself if it might apply to you.
Originally Posted by justruss
What has this place become?
It's essentially a few people graciously answering the same repeating of immature, lazy, demanding questions from the masses.
Nobody searches. Nobody reads the first posts or titles of threads. Nobody even looks at posts a couple above their own.