This question was asked on another forum, answer was given, with a full video demo.
Tricks included avoiding spaces in path: - BladeLogic installation is in c:\BMC\BladeLogic in order to keep the paths short. - Jython install is in C:\jython - again, to keep the paths short - Eclipse workspace is in H:\Development - for the same reason.
All details (including video) on https://communities.bmc.com/message/401377#401377