My wife entered the US on an H4 visa(Jan 2007 - May 2009) based on my H1B(May2006 - May2009). She later got an H1B change of status approved(Oct 2007 - Oct 2010). She wasn't able to work and hence doesn't have paytubs/W2 etc.

I didn't ask my employer to file for her H4 extension as she was on her H1B. I now want her to be back on H4. Which of the following options is the best for me:

1) Use form I539 to extend her H4 since I still have some time(to be specific about 15 days till May 2009)?

2) Use form I539 to change her status from H1B to H4(dont have paystubs/W2/tax returns)?

3) Leave the US, have her go to the US consulate, get a H4 stamp and enter US(with a new I-94)? Will they ask her to show the H4 extension approval/notice of receipt from USCIS