yes it is possible. very possible. you have to find the right person to do it, or watch an expert do it for "relaxer-like" results. i have 2 friends that made the transition. however they only wear their natural hair out once in a blue moon, so i couldnt tell you how damaged/healthy their hair is.
if u sweat alot like me, then i would discourage u from pressing your hair. at least not until the winter rolls around again.
products to try:
keracare silknseal blow dry complex
beyond the zone flat iron protectant (it's orange)
regular old grease
and please dont do this more than every 3 weeks.