Long time missing around Now I bring you Steven CEX-4.53 v1.00 PS3 Custom Firmware (CFW).
Installation and some testing with pictures included is here (hogpro.publog.jp/archives/34739836.html) but wasn't done by me
STEVEN CEX-4.53 v1.00 CFW
1. Built from 4.53 OFW
2. Patched All Core OS ECDSA Check
3. Patched LV1 to disable LV2 Protection
4. Patched LV1 to add peek/poke support
5. Patched LV2 to add peek/poke support
6. It can run Games Signed with Keys up to 4.53
7. No BT/BD Patches to allow installation on consoles with broken Blu-ray Drive or Bluetooth...
2w ago - Following up on his previous release and Sony's PS3 4.53 Firmware release, today PlayStation 3 developer Nathan_r32_69 (aka nathanr3269 or Evilnat_PS3SOS) has updated his PSN / SEN Enabler & Disabler to version 4.53 v5.3 followed by v5.3.1 which allows online access for PS3 CFW users with the changes below.