Aldo, if you have the ambition, perhaps you could create an updater which does the following:
1) Downloads all game updates for a given title, excluding updates requiring a higher firmware than 3.55. Multi-threaded downloads is a must, as Sony's servers delivers files slowly. Have each update downloaded sequentially with multi-threading, rather than downloading all the updates simultaneously.
2) Generate properly formatted PDB files for each update PKG with game title and update revision number labelled.
3) Optional ability to transfer completed updates with matching PDB's to /hdd0/vsh/task folder for easy XMB installation.
http://ps3.brewology.com/psn/updater.php <= Does the FTP and PDB part, but without any detailed labeling.
I'm glad to see you haven't gotten bored with making PS3 related apps yet. Your work is always much appreciated. =)