Yes, it is crucial memory. We got our upgraded memory for $40!!! How cheap is that? The Mac place (not the Apple store, rather a certified Mac "repair" shop) wanted over $100 for the same thing!!! Plus, and extra bundle to put it in.
Nope. Thanks to some very good advice received here, we've saved tons of money and will be able to upgrade our OS to Leopard. Can't beat that with a stick. (On a five year old Mac)!
Gotta love those Macs. :D :D