Im a practicing Buddhist of the Mahayana & Tibetan school. Ive also started the Shambhala Warrior Training as well. Im currently working on my Ngondro. Ive taken my Rufuge Vows, and hopefully this yr will take my Bodhisattva Vows.
Ngondro
http://turtlehill.org/khen/tersar.pdf
www.ngondro.net
Shambhala
www.shambhala.org
I also practice equal parts Paganism, & Santeria, although as pretty much a Solitary in my area. I also still study Catholicism. So yes I believe you can blend them. I also know when its wise to discuss & not.
Ive been studying religions since I could read, both informally & formally. I think they all have something to offer & so much in common. We only need look with both open eyes & open minds.