Couch to 5K Challenge

I am looking to start this cahllenge shortly so I can do a 5k for charity eventually. Can't decide which charity yet but it sounds like such a fun commitment to health how can we pass it up. Here is the program I found.

Couch to 5K Challenge
Week One: Brisk five-minute warm up walk. Then alternate 60 seconds of jogging and 90 seconds of walking for a total of 20 minutes.
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Week Two: Brisk five-minute warm up walk. Then alternate 90 seconds of jogging and two minutes of walking for a total of 20 minutes.
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Week Three: Brisk five-minute warm up walk, then do two repetitions of the following:
Jog 200 yards (or 90 seconds)
Walk 200 yards (or 90 seconds)
Jog 400 yards (or 3 minutes)
Walk 400 yards (or three minutes
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Week Four: Brisk five-minute warm up walk, then:
Jog 1/4 mile (or 3 minutes)
Walk 1/8 mile (or 90 seconds)
Jog 1/2 mile (or 5 minutes)
Walk 1/4 mile (or 2-1/2 minutes)
Jog 1/4 mile (or 3 minutes)
Walk 1/8 mile (or 90 seconds)
Jog 1/2 mile (or 5 minutes)
************************************************** *********************Week Five: Brisk five-minute warm up walk, then:
Jog 1/2 mile (or 5 minutes)
Walk 1/4 mile (or 3 minutes)
Jog 1/2 mile (or 5 minutes)
Walk 1/4 mile (or 3 minutes)
Jog 1/2 mile (or 5 minutes)
************************************************** **********************Week Six: Brisk five-minute warm up walk, then:
Jog 1/2 mile (or 5 minutes)
Walk 1/4 mile (or 3 minutes)
Jog 3/4 mile (or 8 minutes)
Walk 1/4 mile (or 3 minutes)
Jog 1/2 mile (or 5 minutes)
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Week Seven: Brisk five-minute warm up walk, then jog 2.5 miles (or 25 minutes).
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Week Eight: Brisk five-minute warm up walk, then jog 2.75 miles (or 28 minutes).
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Week Nine: Brisk five-minute warmup walk, then jog 3 miles (or 30 minutes).