file uploads Q?

Hello, I have somehow managed to write a scipt that is able to upload and resize images to a server :))) Sad part is that now the user can upload only one image at a time.(user has a browse button for browsing images in his local disk and can pick only one at a time). Is it possible to allow user pick several images and upload them all at once? (I need to pass the images to a function for the resize). Or do I need to give several browse buttons to allow multiple file uploads? Also I have seen a application (written with MS tools) that allows user to upload a zip file containing images and the zip is automatically uncompressed to a server disk. Can this be done with PHP also? All help and tips appreciated! Thanks -Will