if u have an (airband)scanner, you cna simply tune in to your local ACARS frequency, connect it to your sound card with a simple audio cable, and download from a host of different programs…
one of the best ones is AirNav ACARS decoder, which gives u 30 free day’s worth of trying it oput before u buy it (im still in this 30 day period)… couple it with posfix and AirNav suite, and ull get some OK results