It really depends on what state you live in. I would recommend that you check with your insurance company as they can guide you through the process. If they can't or aren't willing to do so, check with your local drivers license division and they might be able to help you also.
SR22 is the only way to get your suspended license back. It is an electronic document that shows that you are financially liable to pay for ur damages and also in future in case of an accident. You can have full info about SR22 on the site : http://www.assureinsure.com/article-is- … e-106.aspx