the profile is driver type hub ie the pawls are attached to the reverse of the sprocket in side the hub. in order to go ffw, you will need to get a new wheel built, new wider bb, cranks, freewheel, bashguard, screw on rear sprocket. if you have a profile, i would stick with that if its in good nick, thay are pretty good. it`s gonna cost upwards of £150 to do it with good quality parts that aren`t gonna break.
you dont mention what bike its on, i suspect a mod, in which case you are better off leaving it be for the moment. if you are intent on upgrading, just get cranks and bb with a screw on sprocket abd bashguard. gearing wise you should be looking at 18-12.
hope this helps
dan