http://www.phoenix-raid.de/Images/EQ2Overlay1.5.zip
this is the compiled dll + cs as latest stable release
the DLL must be in your ACTfolder AND in your Eq2 main directory
then install the cs-plugin in act, rest should be obvious i think
i also found the uncompiled SRC, though i think it was version 1.7 or something, so its not the source of 1.5
however, if anyone wants to have a look into it, here you go
http://www.phoenix-raid.de/Images/OverlaySRC.zip