The table is applicable to all PIC's, but it doesn't include the higher OSC frequencies of the 18F's.

If your interrupt frequency is greater than 160 Hz (80 Hz Full Cycle), you don't need to worry about the table.
Just set Prescaler to 1 and Freq to your frequency.

The RD16 bit buffers the highbyte of the Timer so that both bytes can be read or written without stopping the Timer.
The Timer Template will not work with RD16 set.

With interrupts that require you to manually clear the interrupt flag, setting RESETFLAG to YES will allow DT_INTS to clear it for you.