Henrik has a good information on the ID to use for downloading various packages -> http://per.lausten.dk/blog/2013/10/ibm-notes-9-0-1-and-ibm-domino-9-0-1-are-now-available-for-download.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Per_Henrik_Lausten+%28Per+Henrik+Lausten%29
For IBM Notes Browser Plug-in, the code to use is
Notes Browser Plug-in Lite (without JVM) CIQ96EN
Notes Browser Plug-in (with JVM) CIQ90EN
We have also updated the Notes/Domino WIKI and I can tell you that my colleague Archana Pawar has done a great job in putting together all the information for using Notes Browser Plug-in. This also includes all the notes.ini parameters we support. You can refer to it here -> http://www-10.lotus.com/ldd/dominowiki.nsf/xpDocViewer.xsp?lookupName=Notes+9.0.1+Browser+Plug-in#action=openDocument&res_title=IBM_Notes_Browser_Plugin_9.0.1_NBP901&content=pdcontent
And thanks to each of the member of Notes and Notes Browser Plug-in team for getting this quality release out.