headlight/spotties advice

[sambb]

After a bit of advice on improving the headlight arrangenent on my car. I was recently at the summer rallysprints at eastern ck and it was apparent that I really need to do something about my cars lighting.
I've been told that the easiest thing I could do for the headlight globes (assuming we have H4's) is the Phillips HID conversion kits. is there anyone out there that has done this who could chime in with the details of the conversion and the difference it makes?
Ideally I'd go for spot light or strip lighting across the front but having had the front of the car off I can't remember how/where I would mount a secure bar for the lights. Can anyone help on that front?

thanks for any help
sam