The ad gives both e-mail and surface mail addresses for your CV
[email protected]
or
Hr Dept
Qatar Airways
PO Box 22550
Doha
Qatar
Fax 974 462 6106
All I will add is on the housing front, QR3500 allowance doesn't get you much in Doha unless you share.
I have left the company so sorry cant give you anything more juicy on the actual scheme, a lot may have changed since I was around when it was being discussed.
Good luck with whatever you choose
Bored