Finder requires password every time i move a folder

Hi,
I'm still running OS X Leopard

I'm trying to organise my pictures folders and every time i move a folder into a new folder i have to type my password. Really annoying, and will take forever. Can i disable this? i'm logged in as admin

thx

Dan

Thanks.

Yeah it would appear that most of the older folders are set to read only.

i'll leave it till another day