what version of BL are you on?
Can you not install COM+ packages using blpackage and then use post commands to configure it?
We are using 7.1 version. Blade support helped me with first issue of password. The trick (round about solution) is to verify the package, when you verify the package it asks for password.
I guess I can use post commands to call some script to create package and install it it in COM+. We are currently using MSI install to perform this job.
but the question is why to invest money in blade and still use other alternatives for deploy.
Also blade doesn't do good job on rollback when external commands are in use. I guess it has problem maintaining transaction.