Well this is more lomboz specific quetion, better to be araside at thier forums.
But as far as ejbGenerate.xml in some of teh versions of lomboz it has been replaced by xdoclet.xml.
I'm not sure what versions you are using.
If you want to see ejbGenerate.xml
Then use Eclipse 2.1 with lomboz.21_02.zip
And Eclispe 2.1.2 with lomboz.212.p1.zip.
Also have a look at http://www.jboss.org/index.html?module=bb&op=viewtopic&t=36910
this lnk, which covers this problem as well.