Here is picture how to disassembly nokia 6600 slide

Now you can remove LCD

Lcd join with double tape, round clipper

Unclip/disconnected lcd connector.

After open the two screw, you can remove front cover.

After open you will two screw, Open this two screw.

Round clipper to open this part.

Disassembly / Separate engine module

Disconnect lcd connector ( as shown)

Open the back cover

After keypad removed, you can see two screw, open the two screw and pull housing as direction shown.

Unclip the keypad by clipper

Remove batteray,memory card, and six screw as you can see