USB image

[tron]

 If I want to copy the DF USB image onto my USB stick and I am working 
under WinXP, can I open the archive with 7zip and just copy the 
resulting files/folders to the stick or will I need a special app for 
installing the image to the USB stick?  (Sorry if this sounds dumb, but 
I am only used to the world of Windows and the handbook on DF page only 
discusses installation with CD.)