Converting from a pressurized to a non pressurized basket on your portafilter requires you to just pop the basket off and pop a new one back on!
Is it worth doing? Yes sir it is. A pressurized basket is designed to cater for stale supermarket coffee bricks and produces what some people like to call "fake crema".
All you need to do now is to look for one that fits your portafilter. Im sure some CSers will aid you in sourcing one ;)
All the best!!