Vista - Folder Sharing question

Is there a way to share folders to other computers on the network that do not have user accounts on the computer where the share is located? The public folder is visible from other computers but when I share another folder the other computers on the network can see the share but cant access it. I know that there must be a solution to this problem but I'm starting to lose my hair with all my head scratching. Any help would be greatly appreciated.

I have now discovered via the forum that I have to enable the guest account and change the permissions to give methe access I required. Thanks again to this fantastic site. I'd be lost without it!