I just started auto-crossing/track events this summer, so I'm still a n00b, but I'll see if I can answer some of your questions.
I have koni-yellow shocks on my teg, and when I set the rears to a stiff setting (say 6 out of 8) I have no problem bringing the tail out during hard turns in auto-x. Upgrading the rear sway/tie bar and stiffening up the rear suspension in general will help you rotate better. Some people use left-foot braking/handbrake, but that's not necessary until you're at a higher level. Usually my tail comes out when I trail-brake, lift-off throttle during a turn, stab the brakes hard during a turn (lock up rears), or do an aggressive turn-in without braking.
Since your drive-wheels are on the front, the throttle is your friend. Point the wheels in the direction you want to go and apply throttle as needed. It's safe to say that even if you floor it, you won't spin out. You're front-wheels will either have traction or no traction, in which case your car will understeer.
So basically,
stiff rear susp = oversteer
throttle is your friend
hope that helps...and let me know if I'm wrong about any of the above
Shingo