Windows XP Pro by default enabled Simple File Sharing under the Folder Options > View > last one checked. Because of this option enabled, I wasn't able to give additional specific permission rights to computers which were remotely trying to connect to the XP Pro.
If you ever had the similar experience where you couldn't share files between XP Pro and other Windows OS versions, try these steps.
Preparing basic networking setup
1) Control Panel > Network Connections > your adapter > check File and Printer Sharing for Microsoft Networks
This is the first step enabling both computers to allow sharing files
Windows XP Pro can be enabled like this
2) My computer > Properties > Computer Name > Change
All computers trying to share files should be the same Workgroup name
3) All other Windows OS, simply designate the folder to be shared and allow to be shared by following that OS's instruction
Preparing Windows XP Pro to grant permission from remote computer to access shared folder
4) Uncheck Use Simple File Sharing to give more control over the access
5) Right click on the folder you wish to share, under Windows XP, and select Sharing and Security
Go to the Sharing tab and assign necessary information
6) Click on Permission to add additional access permission
Because your Windows XP Pro would not let other OS to see XP Pro's shared folder, this step will check to see if you gave necessary permission from remote connection to view Windows XP Pro's shared folder
If you do not see GUEST account with its necessary permission follow the next step.
7) Adding GUEST permission which will allow remote computer to view Windows XP Pro's shared folder
Type in GUEST and click on Check Names
8) Your GUEST permission is added
By checking names, you will notice that YourComputerName\Guest is created. Check the appropriate Allow/Deny permission to this account and save by clicking OK
Even though my picture shows permission for Administrator, be sure to click on Guest account and give your proper permission access. These steps will not require for you to create another account under Windows XP Pro to just to have file sharing experience. Most likely you will not have to perform these steps. Most out of box computers were preassigned to allow guests to share files with Windows XP Pro.
