Susan is right here is some more detail,
If uare marrited before 485 approval, ur spouse is eliable for FtJ
FTJ is starts with simply filing 'I-824' (duplicate of approval notice/further action on approved notice) in which u mention all info about u + consulate info where s/he living and , a seperate paper for ur spouse complete info along with supporting doc(read instructions in 824).
When u get receipt of 824, u simply need to send these docs to ur consulate requesting them to initiate FTJ for spouse
1) I-485 approval notorized copy.
2) I-485 form ( which you applied for you permanent residence )
3) Passport copy ( all pages notorized ).
4) Letter indicating that you want to start FTJ for your wife
in the letter give her local address in india.
5) Her birth certificate copy.
6) I-824 receipt copy.
Consulate in few country do not wait for apporval of 824, as they find enough evideience that u have adjusted status.
they immidiately create case No for ur spouse and contact her(home country). and send Packet 3 which includes some instrucitons and form to send them back with signature (from u spouse). as they received back from ur spouse they send DS230 part I & II forms and other instructions for doc and interview letter.
Your spouse have to go for interview to complete get immigrant visa. after sucessful interview she is granted a Immigrant visa along with a sealed envelope, and she can travel to here, when she arriives she returned the envelope to immigration counter, they stamped, And thats it ur family would be re-united

.
Her GC and SS would be arrived in main within weeks.
We wish u Good LUck and I strongly recommended u to read pages 50-86 pages of this special thread of 'following to join' for all pin point detail docs, sample letters etc etc.
start from page 50 > last page so u can und the process.
http://boards.immigration.com/showthread.php?t=96693&page=84&pp=15
Sample letter of consulate
----------------------------------------To
IMMIGRANT VISA SECTION,
Complete Address
Subject : Following-to-join benifit for my spouse.
Dear Sir/Madam,
I bacame permanent resident of the U.S on ( "put date" ) ,I got my permanent residency
through employment category , I would like to apply for the following-to-join
benifit for my spouse, since we were married prior to my permanent residency.
Please find the enclosed document
1) Notorized copy of I-824 receipt.
2) Notorized copy of I-485 adjustment.
3) notorized copy all pages of passport
4) copy of marriage certificate
5) copy of birth certificate of my spouse.
MY soupse's local addres in india is .
"HIS/HER NAME"
"REST OF THE ADDRESS"
thank you,
your's sincerely
ABC
Date :
-------------------
--------- commom questions in FTJ interview ---------------
1) how long ago you were married ?
2) what does your husband do ?
3) how did you meet your husband first time ?
4) which company does he works for ?
5) when did he last visited you
1) Whats your husband doing?
2) Where are you going?
3) Whats your marriage date?
4) Whats your marriage day? (little tricky quesiton)
-------------- Also read -----------------------
http://uscis.gov/graphics/howdoi/appproc.htm
Following-to-Join Benefits for Spouses
If you were married before you became a lawful permanent resident, and your spouse did not physically accompany you to the U.S., your spouse may be eligible for following-to-join benefits. This means that you do not have to submit a separate Form I-130, Petition for Alien Relative, for your spouse, and your spouse will not have to wait any extra time for a visa number to become available. In this case, you may simply notify a U.S. Consulate that you are a lawful permanent resident so that your spouse can apply for an immigrant visa. Your spouse may be eligible for following-to-join benefits if your relationship still exists and if one of the following is applicable:
You received a diversity immigrant visa
You received an employment-based immigrant visa
You received an immigrant visa based on your relationship to your U.S. citizen sibling
You received an immigrant visa based on your relationship to your U.S. citizen parent when you were already married
(For information on following-to-join benefits for children of lawful permanent residents, please see Petitioning Procedures: Bringing a Child to Live in the United States.)
If you fall into one of these categories, please submit the following information to the U. S. Citizenship and Immigration Services:
Form I-824, Application for Action on an Approved Application or Petition
A copy of the original application or petition that was used to apply for your immigrant status
A copy of the I-797, Notice of Action, for your original application or petition
A copy of your alien registration receipt card or I-551
If the I-824 is approved, the USCIS will notify a U.S. consulate that you are a lawful permanent resident so that your spouse can apply for a following-to-join immigrant visa. Your spouse must then contact the local U.S. consulate to complete the processing.
You should file the I-824 at the USCIS office that took the most recent action on your case
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Good Luck and happy re-unite family to u
