> I'm not sure I quite understand how ADCON1 works on the 16F877,
> Im looking to have two or three analogue inputs and still maintain
> the rest of the pins as digital I/O's

Your best bet would be to set PCFG3:PCFG0 to 0100. That gives you
3 x A (RA0, RA1, RA3) and 5 x D

0010 sets PortE to D and PortA to A if you'd wanted 3 x D and 5 x A ;-(

Table 11-2, DS30292B (F877 Manual) or Section 21, Mid-Range Manual

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