Remote Desktop Connection (Terminal Services Client 6.0)
XP client: http://www.microsoft.com/downloads/details.aspx?FamilyID=26f11f0c-0d18-4306-abcf-d4f18c8f5df9&DisplayLang=en
XP x64 client: http://www.microsoft.com/downloads/details.aspx?FamilyID=160ce316-bf2b-48d0-a035-e2abbc55d8e8&DisplayLang=en
2003 Server client: http://www.microsoft.com/downloads/details.aspx?FamilyID=cc148041-577f-4201-b62c-d71adc98adb1&DisplayLang=en
2003 Server x64 client: http://www.microsoft.com/downloads/details.aspx?FamilyID=43c0eae9-6b64-428f-a9dc-f97f5a1b4493&DisplayLang=en