Driving a mosfet directly?

[passion1]

I would like to use a power mosfet IRFP460 to switch a 24V circuit.
The IRFP460 is a n-channel mosfet with the following rating:
Vdss = 500 V
Id(cont) = 20A
Rds(on) = 0.27 ohm
Vgs(th) = min 2V max 4V
Vgs continuous gate-to-source 20V

Can I drive this mosfet by connecting the gate directly to my PIC16F73 output port or do I need a mosfet driver?
Also, can I connect the mosfet source directly to the ground of the 24V supply, and drain goes to load with other side of load going to +24VDC?
If a driver is needed, can you recommend a suitable driver.
If a driver is not needed, is it then necessary to put a resistor inbetween I/O pin and gate and if so, what size?
Any help is appreciated.