Ты ищеш UltraVNC SC (SingleClick)
UltraVNC SC is a mini (166k) UltraVNC Server that can be customized and preconfigured for download by a Customer. UltraVNC SC does not require installation and does not make use of the registry. The customer only have to download the little executable and Click to make a connection. The connection is initiated by the server, to allow easy access thru customers firewall.
Программа бесплатна. Вот страница:
http://www.uvnc.com/addons/singleclick.html