i need to be able to share files between the computers connected to that network without having to install any new hardware of cables in the computers
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Yes you can do this by move your files into sharing folder.To enable the files and folder sharing in Windows XP Professional 2000 and Windows 2000 do the following.
1. Right Click on the folder name you want to share.
2. Click on the properties.
3. Click Sharing.
4. Click on Share this computer on the network.
5. Assign a shared computer name.
You can set the sharing rights for the users and also control the shared folder access by allowing and denying permissions to specific users or groups. If you want to share the individual files, you can put the files in the same shared folder. All the files and folders in the parent shared folder will be automatically shared