It is possible to do that with my installer, since all it really does is downloading a bunch of files to a specified directory and then starting a specified system process (batch/shell script in my case). However for the installer to run at all a JRE has to be already present on the system.
JRRT not running here either, it's crashing at some lwjgl stuff. i'd really like to see how it's performing since oracle/bea claims that their vm is the fastest.
i did some benchmarks myself and the result i got that JRockit is faster at multiplying matrices while the sun server vm is a lot better at optimizing nested loops.