Using a heat gun, heat around the edges and seperate the glass from the front cover. Work from bottom up.

Note the digitizer cable runs through a small hole behind the lcd, in the top of the phone.

When the glass is seperated, carefully lift the lcd a bit, to get the digitizer cable through the hole.

To protect the lcd from residue and fingerprints, cover it with masking tape, until you are ready to seal the glass to the cover.

When you have prepared new adhesive tape and the digitizer cable has been pulled through the hole to the backside of the phone.

Remove the masking tape from the lcd, and using some canned air, blow away dust and close the glass cover.

Finally reverse the disassembly and enjoy.