5.50 GEN D3 works fine with PSNFucker. I am on CFW 5.50 Gen D3 Final with PSNFucker. The purpose of the PSNFucker is to bypass the Requirment for an update to be installed. Resistance retribution required each user to have the latest OFW installed on the PSP. There has been absolutely no problems with this while i have been using it.

If you want if you should search for it on google or look for it on here. Hope this helped.