The standard routine, cookie cutter basically, is to find your 15, 10 and 5 rep maxes. You then do three microcycles broken into those rep ranges, 1 microcycle where you increae the weight for two weeks until you hit your 15 rep max, then do each other rep range. Say your maxes for bench are as follows, 150 for 15, 195 for 10, 235 for 5, then your weight progression may look like this:
1 Set of 15: 125, 130, 135, 140, 145, 150
2 Sets of 10: 155, 160, 165, 175, 185, 195
3 Sets of 5: 185, 195, 205, 215, 225, 235
Do that for every exercise, increase the weigh every workout as shown, and that's the general routine. You find the max weights first, then decondition for 2 weeks, then start the routine. As for a couple of things:
Don't worry about the rep ranges. They aren't too critical, it's really just a structure to allow for what's really crucial which is a consistent weight increase over time. Don't worry too much about zig zagging, such as in the above example where after the tens you drop to a lower weight again. The progression over time is what matters.
If you look on the HST boards you'll find a variation called clustering, it's a better version of HST. What you do there is just figure out youre five rep max, set your schedule by increasing the weight for six weeks up to that weight and just do a set number of reps no matter how the sets end up breakingout. This sheet has both versions in it, unfortunately the exercises are fixed but if you plug in some rep maxes in the grey fields in the top of each sheet, and then enter a weight increment percentage you'd like to increase by each workout, it'll lay out each workout for you so you get an idea of how the program works. I've also attached the HST FAQ in PDF format for you.