Yep. thats all there is to it, The bottom screen however is a bit trickier, You gotta dismantle the whole thing plus you gotta deal with the digitizer. Be lucky it was the top screen. Lol.
How did it get broken anyways?
ok you see those 4 rubber things? that are square shaped? Well, take those off and with a small screwdriver take the screws out. there you just opened the top screen.
Er well actually thats a myth, One link gives you oathkeeper, two gives you oblivion and three does nothing. I've tryed it, And I've beat the game in japanese and english.
Oh well then your gonna want the newest one (I believe its the one that changes your cards banner for 1.4dsi firmware) And your gonna want the newest version of sakura after you flash the firmware using your pc.