Today 2615863 has released a PS3 Add Ons (PSN DLC) PKG downloader followed by v2, which currently supports USA files with a European update in the works as well.
Download: PS3 Add Ons (PSN DLC) PKG Downloader / PS3 Apps Updater / PS3 Add Ons (PSN DLC) PKG Downloader v2
To quote: This small application allows you do check an add on you want and download it. Its very easy to use.
I will implement an update which you can download directly from the app regularly. I am going to make one for European PKGs, as well as Demos and Full games so stay tuned into psgroove.
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