InLuxury was unveiled in May 2007 as part of a wider push by the Daily Mail-owned brand into niche markets.
The improvements include incorporating existing search technology used on the flagship Teletext Holidays website into InLuxury.
Managing director Matt Cheevers told Travolution some additional work had also been carried out on the homepage and product display information for package and tailor-made holidays.
Cheevers confirmed that the fledgling brand will now be backed with a seven-figure marketing campaign from March into the final quarter of 2008.
Meanwhile ex-ITG sales manager Shazia Fleming was appointed this week as sales manager for InLuxury.