@ Guy Tensed, yes you are right but even before going for the Labor Certification ETA 9089, you should get prevailing wage. This will take at least 4-6 weeks.

Let me summarized to avoid confusion:
1. Is your company willing to file Green Card for you? if Answer is  yes and by all means then.
2. Get a prevailing wage from DOL.
3. With that prevailing wage, file ETA 9089 which is to get the labor Certification.
4. After getting the labor Certification, Check the Visa Bulletin and do accordingly.
If visa bulletin is current then File I-140, I-485,I-765, I-131,I-693 together.
If visa bulletin is not current then just file I-140 and wait until visa bulletin becomes current to file rest,
5. Wait for letter for the finger prints and done.

But within these steps there are lots of things to take care which is not easy explaining in writing. 2 way communication would be easy.
Hope this helped a bit.