If you compile wupdate_ssl.sbp (located in ..\1033\Redist) then by default, it's not signed at all.
What you do is, you enable code-signing for this wupdate_ssl.sbp project so the resulting wupdate_ssl.exe has YOUR (any only your) code-signature.
In the Script Editor, open the following line:
Install Web Update Client (SSL) "[SB_LIB]\WUPDATE_SSL.EXE" to "%_SB_INSTALLDIR%\WUPDATE_SSL.EXE"
Then point "[SB_LIB]\WUPDATE_SSL.EXE" to your own compiled version of wupdate_ssl.exe. That's it
Does this help?
Friedrich