You must add to yor PIC 4(or 2,depending of cind of stepper)transistor
 switches,two whire LCD driver(as AOY438), two button('increment' & 'decrement')
 and(or)
some sheet for remote control.Then you write some program and turn on.
If any questions, please reply.
Dmitry. ITEP Moscow. kozodaev@vitep5.itep.ru