Okay, lame question. I have finished the first case and my husband would like to try, but for the life of me I am having a difficult time figuring out how to insert my user name. I am fairly new to the Nintendo DS system. Any suggestions?

Thanks in advance!

I contacted Ubisoft, the maker of the software. I am posting their response in case anyone else is looking for this answer:

Unfortunately, you can only have 1 profile on the DS. Each Case in this game has it's own save file though, so you could be working on a different case that your husband is working on and neither of you would overwrite the other's active save file.