@Neil
funny thing i tried the same thing on garmin's site, also found this link to a slightly smaller jcv file (D2335090A.JCV) here even though its not listed anywhere else but here!
[Only registered and activated users can see links. ]

about the using a microSD card don't have one free laying around and figure why waste one, also i fit it on my device buy it slows it down like crazy and keeps freezing all the time especially when searching poi's