This patch will enable two or more concurrent sessions in Windows XP PRO Service Pack 2 (SP2) and Service Pack 3 (SP3) if you have FAST USER SWITCHING enabled, and your windows is NOT in a domain.
Uninstaller is also included and can be found at windows Control Panel -> Add or Remove Programs.
Windows XP PRO SP2 screenshot
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Windows XP PRO SP3 screenshot
Download Outdated 1.0 Binary
Originally from http://www.kood.org/terminal-server-patch/