You're right using Get_Analog_Value(rc_ana_in01); . Now I dont really remember how this is done, but we had the same problem. I can help you with this much, it should not be declared as a 10 digit number or whatever, you just want a 2-3 digit number. I'll try a rough example, it might click in some of your brains.
int analog1; /*This is declared up in the program)
analog1 = Get_Analog_Value(rc_ana_in01) << 2);
/*end*/
Something like that. Somebody correct me or explain better. Sorry I'm out of my brains right now.
. But I hope this gets you somewhere at this moment.