I noticed that I wasn't able to resign npdrm eboots just with these keys. I tried adding the new appdlr keys listed here to the keys file we have been using with scetool up to this point and it is now working great. I am using it with aldo's ps3tools 2.0.38 (it comes with the full version of multiman) and I am able to resign anything just by right clicking on any sprx/eboot/self file and selecting resign 3.56+.
Here is the keys file:
http://rghost.net/41267017