2MB Upload Limit, which folders need php.ini change?

Ok so in my other blog post i was able to find the source of my 2mb upload limit, it was the php.ini default setting of 2 megabytes, i contact my hosting provider and they told me that i can make my own php.ini file however its settings aren't applied recursively and it must be copied to every folder you wish to use custom settings for.

So i am wondering, i am getting the "upload shouldnt exceed 2mb" pink box when trying to upload profile music.  Which folders should i place the new modified php.ini files into?  Or do i really need to add it to every single folder?  Thank you!