There is no ASUS SLIC 2.1 and just for your information, you will never see ASUS SLIC v2.1 because they have opted for a different approach....so, what other slic do you want.
for Ex Acer Aspire 5520 v1.33 i can't find slic 2.0, so i don't know where to add slic 2.1. I use PBE and HxD editor. Phoenix bios tool does good job