change logo for this dell please

[tattoum]

because afudos gave "security verification failure" when flashing modded rom, i readed full dump of bios Aptio 5 with external programmer, i changed boot logo using phonixtool266 and flashed it back = system boots, show modded logo then black screen with error "Boot Guard verified DXE that is fail
System will shutdown
Press any key"
i also tryed uefitool to change logo= same result
logochanger 5 says no logo in file
please help me i urgently need the logo to replaced on many bios's

anyother tool that works 100% on uefi aptio 5 american megatrend bios on DELL

or anyone could change logo for me (replace DELL logo with any thing just to test if it is ok)
this is full dump : 
http://www.4shared.com/file/B3_k0Fxlce/B...6473E.html
thanks

[tattoum]

please help, is there any solution to disable or bypass boot guard verification?