I upgraded my ram and that cover was very difficult it took me a good 8 minutes to pry off. The whole time I was worried the thing would snap! I’m not sure what tips I can give sorry 🙁 Thankfully I shouldn’t have to open it ever again.
My NC10 had no problems detecting the ram in the BIOS or XP but since I upgraded as soon as it was delivered I can’t say if it has made any difference. Still for Â£20 its really a no-brainer upgrade.