im pretty sure im activated with win 7 ultimate for the motherboard of asus a8n32-sli-deluxe using the modded 1405 bios with dell cert and the pub key for dell (i think it was #2 but it might be #3) everest says my slick is dell and win7 "my computer" shows activated... so looks like you all did a great job!!!
it was the 1405 one but i dont believe it was yours i think it was Ruixituh`s A8N32-SLI-ASUS-Deluxe-1405_Dell2.1. normally i wouldnt say it was whos but i did a file compare with a binary editor and they are different ones...yours and Ruixituh that is. you might want to compare your 1405 and 1409 to his and let us know what the diff is.
I have no idea why they would differ other than possibly we used a slightly different SLIC .BIN. We used the same tool and method so I am confident they would both work equally well. You should post this as confirmed working with his mod in the SLIC 2.1 mods tested / untested thread.