6.Release the 128 MB DIMM DRAM by pressing your thumbs outward on the locking tabs on each side of the module so that the tabs move away from the module.
Figure 19: Unlocking the Memory Module
7. Grip the long edge of the memory module and slide it out. Set it aside.
Figure 20: Removing Module Slots
8.Insert the 256 MB DIMM DRAM into the slot. Exerting even pressure with both thumbs upon the upper edge of the module, press the module downward until the locking tabs click into position.
Figure 21: Inserting the Memory Module
Upgrading Memory 55