yeah man installing memory is a snap....literally. If you have the common sense of a 10 year old and the steadiness of rock you'll be good. All it is is literally a stick, I'm sure you've atleast seen a stick of ram.
is a nice site for some good cheap ram. So is:
Check out that board. See the two light blue slots on the bottom right? There's your RAM slots. You push those two white clips out then push down on the RAM into the slot while bringing up those white clips until they click into place! It's that simple. The only thing you gotta look for is a groove on the ram that's a little off-center. You gotta match that up otherwise the RAM won't be seated correctly. A very common mistake and I've found myself start to almost put the RAM in backwards. It's REAL easy to change RAM so don't be worried about it one bit
On the amount of memory you want to upgrade depends like most said, on your current system, if you only have 256mb RAM then another 256mb RAM would be pretty good. But if you have PC2100 RAM and could fit in PC3200 (just an example) then that's something to think about. So we need to know the kind of memory the 256 is too
Then there's always high performance memory, value memory, and all that good stuff. Good luck and welcome to the forums