elomda99 , it is possible to change your original 128MB to a 2GB chip. However, you will need to take note of the original 128MB chip's pinouts, get the datasheet for it.
The new 2GB chip needs to have the same exact pinouts as the 128MB's.
More information on swapping the chip can be found here
http://wiki.s1mp3.org/index.php/How_..._a_memory_chip