Once your profession is in MOD list, approach a migration agent or refer http://www.immi.gov.au and do all processing online. Apply through the immigration department's web site and pay online. Use the reference no to login and upload any further documents demanded by the department. Also the status of the visa processing can be checked online.
For someone in IT, the most important step is to get approval from ACS (The Australian Computer Society). The link has all the information. Basically ACS is the authority who evaluates qualification and experience of IT professionals. If one get approval from them, it half way to Permanent Residency.
All the above 18 applicants has to write the IELTS exam and get the required percentage of score. Need to check the immigration website for the required score.
Next step is get health certificate from Australian Immigration Panel Doctors. Make and appointment and do health checkup and the doctors will send it to the department with the reference no of the visa application.
While processing the case office may ask for further documents and we can scan it and upload online through the immigration site.
All need to do is wait patiently and get ready for the Australian permanent residency.
Make sure you have some contact before arriving in Australia to find accommodation, make bank accounts, register in centrelink etc. Soon you can start job hunting; Lucky if you get job in a couple of weeks. Normally people do supermarket, warehouse or petrol station jobs before they get the real job.
It depends up on personals, if one has to go through all these exercise and experiments.
good luck!