Hi Bula,
Schemes such as these get advertised in industry magazines etc. for instance flight international. They are also put on the recruitment sections of the company web sites. Unfortunately there is a glut of wannabes so competition is fierce to say the least. I wouldn't be surprised if the advert was only there for a week and they got thousands of applicants. The selection process is something like...
Thorough online application form.
Telephone interview (masked as arranging a time for an interview)
A barrage of tests including psychometric, IQ and personality.
If you get accepted, it's generally only a gentleman's agreement anyway. Basically, they tell you to go on "this course" on "this date" and if you "do well enough" (not exceptionally well, but certainly not just scrape through) then the next person they recruit will be you.
It's not a sponsored scheme, it's a mentored or approved scheme. You're the one taking the risk. You pay the money. You've just got a higher probability of getting a job soon afterwards. After all, the airline has said that they'll recruit you when they have a job available.
Places to look:
Flight international
CAE web site
Oxford aviation website
Flybe
Thomsonfly
Things may have changed by now. That was the story 5 years ago when I trained.