mario and sonic winter olympic games

the game freezes when i go to iceland or w/e the 3rd place is called in the adventure mode o.o

Take a look in the Sticky Thread for this game:
https://www.romulation.org/forum/index.php?topic=24818.0

You'll specifically need to use a save-file past that point in order to continue. Search the threads in this board.

Replying to #3

k searching
Post Merge: [time]1256947884[/time]
says something about renaming the sav file but what should i rename it to

You delete your old save file (back it up if you want to) and rename the new one to the exact same name as the ROM, but with .sav instead of .nds as its extension.

Replying to #5

rename t he new what?

The new save-file, in this case, one at this point in the game. Give it the same filename as the ROM.