I cut the original heatsink in half and stuck it on the rams. It's just enough for a 50mm fan. I attached the fan with a ziptie, it stays there happily.
Lapping is a process of using finegrain (600+) sandpaper to make the bottom of the heatsink flatter & smoother. I haven't done any lapping myself, so I can not give any detailed explanations. Basically you just use 2-sided tape to attach some finegrain sandpaper to a mirror (for instance) and start rubbing it... Someone else will be able to give a more detailed explantion, I'm sure.
The "Blorb" is a Blue Orb, hence the name.
It is a heatsink made for cooling GPUs & chipset northbridges. Looks nice (as orbs do...), especially on a card made by guillemot/hercules, because of the blue PCB they use in them.
And remember, stupid questions are the only ones left unasked.