Leg pressing would be a very weak replacement in my opinion, but it would be better than nothing. Can you not buy some weights to squat, or get to a gym or something?

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-Youngtricker

it says in the vjb that if you cant squat replace with leg press but you have to be abal to do 3x your body weight insted of two to start ploys

depends on the leg press--
certain machines set it up so that the excercise works your leg just as much as squats do, you can just do more weight

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Ballin'

I disagree with you the vjb contains some light and effective programs fo' begginers. Like their begginer plyometric program, and the other one which is a bit harder but kelly ( the author of this book) recommends fo' guys who dont have strength but they have a bit experience in plyos for example they did the begginer one.
Contrary, the intermidiate plyos are recommended for guys who squat 1,5x of their bodyweight.But i know guys(4 or 5) who did not have so much strength and they gained around 6+ and one of them he gained 5 in week 5( i can prove it).
Sometimes plyometric is a good way of training for every athlete and as kelly says if havent gain 2-3+ in the end of third week from a plyometric program you should start a strength program because it detects your weakness.

to sum up, plyometric is a miraculous , thaumaturgic and the most popular training for sprinters and jumpers.

no man sprinters sprint

You can definately not replace Squatting by Leg Press.

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All just an illuzion...