SEROUT,HSEROUT or DEBUG ? max 232 or no max232 ?

[mackrackit]

Of the following choices SEROUT,HSEROUT or DEBUG which one do I choose
1.To communicate between two pics

SEROUT,SEROUT2,HSEROUT

2.From PC to PIC which one should I choose in the following instances
A.Without a max232n
B.With a max232n

A.Without a max232n
SEROUT,SEROUT2,DEBUG
B.With a max232n
ANY

3.From PIC to RF

4.From PIC to IR

ANY

For all the above when may I use the internal oscillator and when not ?

Bauds 4800 and below most times

And lastly ....
Assuming the Port I would like to transmit/send the data out of is PORT C6
and the receiving port is PORT C 7,
would the line be something like

Loop:
SerOut PinNumber,T2400,DataOut
Pause 100 'Delay for Receive viewing
goto Loop

Looks OK