Hi,
I'm pretty new with the HPC myself, but I am loving it. The file you've downloaded is a CAB file, which you need to download onto your J728. Do not unzip the contents of the file, just transfer the whole CAB file onto your J728 and double tap on it on the J728. It should then pretty much install itself.
By the way, you should be aware that HPCFactor has a support document on an issue with Adobe 1.0 causing some third party apps to not run. The workaround can be found here...
http://www.hpcfactor.com/support/cesd/s/0084.asp