Ed,

Settings depend on your hardware and software requirements.

E.g.: Do you have internal or extrernal Vref for the ADC? If it is internal and you want the Vref to be at Vdd and ground span, you should set VFG1:0 as 00.

So, I will try to give you an approach and if it is not close to your circuit we can change it.

ADCON0: %00000001 ' This sets the ADC channel to 0 (AN0) reference at power supply and converter is ON, ready to convert.
ADCON1: %00000001 ' All inputs digital except channel 0 (AN0)
ADCON2: %10110010 ' Right justification, 16Tad acquisition time, Fosc/32 to be safe.

Now, when all this are setup, you only have to set the GO/DONE bit (ADCON0.1=1) and wait until it is cleared (WHILE ADCON0.1:WEND).

Then get your 10bit result from the ADRESH/ADRESL registers or the variable you use in ADCIN.

Ioannis