Oh, goodness, well it's not difficult but it can be paperwork intensive. Your best strategy is to ask your employer/mandoub to begin the process for you. They will advise you as to what documentation is needed. It will include a letter from your employer, your marriage certificate, a photocopy of your wife's passport. You may need to ask them if it's best to bring her in on a toutist visa and then convert that to a residency permit under your sponsorship. Do know that if she is out of the country for more than six months her RP will be cancelled.