root said:from a quick search that phone uses symbian os...
you should look on a symbian download site for a program called Fexplorer.
it's here for the series 60 symbian OS... I don't know what version yuor phone runs though.
http://my-symbian.com/s60/download/search.php?name=FExplorer
with this program you can search through all the folders, (including system folders) on your phone and delete the stuff you don't want.
hmmm... never heard of a symbian w600i. where does it say that?
edit: its a walkman phone i thought id add, you might of got mixed up