If you have ever taken a laptop apart then you will have seen that on most laptops
the cooling fan draws in air via a grill and then blows this air around the
CPU and exhausts to the outside world again. This air is NOT circulated
around the rest of laptop case to dissipate heat.
What did they charge you for the surplus (read junk) 64 MB memory card. I would try to get
my money back since it's of little or no use. Try to elevate the laptop and see if you can buy a cooler pad
with built-in fans (does that laptop have a 17inch screen?)
I would check your PC specs to see if a 1 GB card will work or go online and use a memory configuration site. Good Luck.