Sorry for going a little off-topic, but I would like to inform that Hellcat's Recovery Flasher probably won't work on the 5.03 HEN. The kernel NIDs have changed and I think Recovery Flasher relies on some M33 modules so the PSP-1000 and [non TA-088 V3] PSP-2000 users can't get to custom firmware through that application.
So if anyone was looking for a way of getting custom firmware thorugh their 5.03 HEN using the easy method of Reocvery Flasher, they are out of luck until Hellcat ports the Recovery Flasher to HEN 5.03 kernel.
I`m 100% sure he will update it, if it is needed and possible.
If Hellcats Pandora Installer works, all PSP 1000 and PSP 2000 TA 85v1 owners are quite lucky ;-)