The ibis2signoise program can be used to convert the EBD models into either boardmodels or, in some cases, package models. If there is a single path, or more importantly a one to one map of the pins in the EBD to a single IOCell(not like a memory module, where one connector pin goes to many IOCells) then you can use the Originally posted in cdnusers.org by horner
-ebdcomp switch when running ibis2signoise. This should then make a pkg model that you can use for the package. You build up the IBISDevice file as normal with the IOcells defined by the vendor, with the EBD converted package model assigned.
If you don't use this route, then you need to convert the EBD into a boardmodel and use the designlink process to simulate. This approach has a caveat right now in that the boardmodel cannot be used to extract a accurate model into SigXP. Look for an appnote to be posted soon to address this issue in more detail