they run hot if you leave them on for a long time, but it's expected. probably a good idea to use a cooler, but if you don't just make sure it's on a hard surface that the laptop can't sink down in (there may be cooling slots on the...
adding salami for memory would void your warranty, as would throwing it out of a window or dropping it in the fishtank. properly putting any parts in that were designed for it specifically, will not. and if you ever did have a claim,...
i looked at your link, that's a pretty nice machine for the money, the only thing I wouldn't go for is the 4200 rpm drive - though it would make the battery last longer, it's painfully slow to load applications and windows.
centrino...
