How can we remotely access computers which are having same static IP address

Windows XP has a utility, called Remote Desktop Connection, which lets you access a computer remotely. You can use it to access your friend’s computer and vice-versa in the following way. First, enable Remote Desktop on both the PCs. Open System in the Control Panel and click the Remote tab. Check the box next to Allow users to connect remotely to this computer under the Remote Desktop section, and click OK. That’s it; you can connect to each other’s computers and view each other’s Desktops.
For those who do not have a static IP, there are other ways: register for free at www.LogMeIn.com, and download and install the application on the PC that is to be accessed remotely. The host PC does not require the application to be installed; all you need to do is log on to the site and sign in. You can immediately start accessing the Desktop of the target PC. This works even if either or both of the PCs is / are behind a proxy server.