insurance claim check

i recently had some water damage to the bathroom and kitchen. I will be issued a check from the insurance company and was wondering if i could do some of the work myself. I am pretty sure i am able to do the work under their guidelines but i was wondering if they would still pay me for labor like they would a contractor. Also if i can get materials cheaper than what they estimated it for would i have to pay back the difference or would i keep the difference? I know once the work is done i will have to submit receipts and pictures to verify it and then i will be cut another check for the depreciated value. Any input would be appreciated.