If you don't want to download 400MB here's a way you can download it easier. (assuming you can get HaRepacker to work).
Here's an album of images on how to do it.
(won't let me post external links yet, remove the spaces and fix the link, sorry)
imageshack . us
/g/ 192/48479491 . png/
HaRepakcer if you don't have it (it's under the harepacker folder)
mediafire. com /
?zzhnzutd2m4
The map IMG file
mediafire . com
/?gkc9fzeopc1pj1f
Basically this is what you do:
1. Close MapleStory
2. Open HaRepacker.exe
3. Click file>load and navigate to your MapleStory folder; select map.wz
4. Expend Map.wz, then expand Map, then expand Map9.
5. The second img file is listed here is usually the FM. (910000000). If you're editing another map, refer to the ID in the name of the IMG file that you downloaded.
6. Select this map (not open) and press ctrl+r. This should remove the file.
7. Highlight Map9 again, go to the XML tab and click import.
8. Select the img file that you downloaded. This should make the 910000000 reappaer in HaRepacker.
9. Click file>save and overwrite the current Map.WZ.
10. Congrats, you just replaced the map file within 2 minutes without having to download more then 1MB !
11. ????
12. PROFIT
edit: ALSOO, this allows you to combine multiple people's maps! if they edited fm rooms or something you can combine them however you like. also, this wz that I uploaded does NOT have the optional wz for this server, so you may need to use this method (and upload it for those who don't afterwards, since I won't) to get the both of best worlds.
~Darek~