Once the federal level LC is approved and your lawyer or employer gets the LC approved copy from federal DOL, you can immediately file for I-140, I-485, EAD, and AP.
If your LC is approved start collecting the documents to file I-485, EAD and AP, you have to do the medicals, photographs for I-485, EAD, AP, make the copies of all the passport pages, copies of all the current and past H1 approval notices, copies of all the I-94 (front and back) your Birth certificate, if spouse is also filing then affidavit of support I-134 to be notarized, IF service center is NCS or VSC you have to submit the driving license and Passport first page color copies
I-140 is to be signed by your employer and he has to provide company financial documents your LC will be attached with I-140 and copy of your all the education degrees, copy of Education evaluation done in US, all the past Exp letters
EAD, AP can only be approved if I-485 filed and separate application for EAD, AP is to be filed
Go to BCIS site and read the instruction for I-485, I-765, I-131 and down load the forms
For EAD, AP you have fill up the form I-765 and I-131, and provide the BCIS fees and photographs
Read more info:
http://www.immigrationportal.com/forumdisplay.php?s=&forumid=195
http://www.immigrationportal.com/forumdisplay.php?s=&forumid=190
http://www.immigrationportal.com/forumdisplay.php?s=&daysprune=30&forumid=199