5.03 HEN-C is 5.03 GEN-C for chick"HEN." HEN is the exploit and GEN is the cfw that can be used for it. i guess that 5.03 GEN-x was nicknamed to 5.03 HEN-x. yet, HEN and GEN are two different things.
psp-3000 and psp-2000 w/88v3 will both benefit from 5.03 HEN-C cfw. brite and 88v3 users can play 5.55+ games with 5.03 GEN-B but C will add a few extra things.
5.50 GEN-D3 is an update for users w/fat & slim w/v1-2 mobos who have been running D2.
PS1/SCPH-7501 | MM3 modchip
PS2 v9 | 250GB hdd | PS3 component cable | katana 32mb mc
PS3/CECH-2001B | 250GB hdd | 3.65 ofw