HOUSTON— iHotelier, a division of Webvertising, is now the central reservation system (CRS) behind www.centraldereservas.com. Catering to the European market and with 4,300 published lodging properties, the destination site, which has been online since 1996, promotes lodging and tourism within Spain and Andorra. Different Travel, publisher of the site, is quickly converting hotels to the online reservations system and expects to have over 200 hotels delivering online inventory through centraldereservas.com and iHotelier within the next few months. iHotelier, represented in Spain by Avantur (www.avantur.com), has also entered into a reseller agreement with Different Travel through which Different Travel will be able to offer the entire iHotelier electronic distribution solution to hotels in Northern Spain.