Hacking Stuck in Preloader rev 4

[glupinga]

After I updated to System Menu 4.2 (with Waninkoko's Firmware Updater) I reinstalled Preloader rev 4 and I got this error message in Preloader:
"Preloader error autobooting system menu. ES_DiVerify failed!"

I searched around and there was someone who had selected another System Menu IOS, to IOS60 instead of IOS70 with success.

I tried this, but the System Menu IOS that is displayed now is IOS560 (under Settings) and I can not select another IOS, start System Menu, HBC or BootMii IOS.
Load / Install File results in : "Writing file failed!"

Preloader displays
IOSv60
System Menu v0

Is there a way out of this?

EDIT:
When I insert a SD with the BootMii folder and try to launch BootMii IOS from Preloader I get this happy message: "Error booting BootMii, maybe IOS not installed?"

 

[glupinga]

Selecting HBC to autoboot was the way out ...

 

[spritefreak]

Is Priiloader 1.0 the most up to date? What is rev 4?

 

[glupinga]

Preloader v0.30 rev 4 : http://gbatemp.net/index.php?showtopic=185487