Correction:
The netbook is not easy to open, but it goes !!! After removing 5 screws (4 under battery and a central bottom but through a Gummipfropf hidden) is the Total Housing "nurnoch" with snap-in assembled. The RAM is also not soldered! I have this netbook now with 2GB RAM in front of me!
With the 2GB there is a prima netbook (but I have the normal work always about 1,100 MB RAM usage without 2GB It could not halt)
Anyone who does not trust the open can just go to a computer store, there will certainly help him.