Hello Shivatar,
Like Tiffany, I welcome you to the forum.
Your post drew my attention because you are an Open Focus user/veteran, while I am just dipping my toes into Open Focus waters..... but I do have 9 months of BrainEv under my belt!
I do it [Brain Ev]along with Open Focus which I tell myself in my mind to focus on various body parts etc....
Shivatar, if I were you I would not do Open Focus 'imaginings' while you listen to your BrainEv session. BrainEv is a 'stand-alone' product, and really the less we force/manipulate/interfere with the process the better it will be for you. Why do I say this? Well
BrainEv does its stuff (giving us a thorough mental marathon through specific brainwave frequencies at each level)
whether we like it or not! That is why it suited me so well. While I would have liked to be a great meditator, unfortunately that has escaped me. [Not only am I a forum chatterer, I am also a mental chatterer, so 'shutting up' the voices in my head really was beyond my pre BrainEv ability.] Yet when I put on those headphones and just heard (note I say heard as in passive hearing, not active listening, the whole point being to 'let go') the track AMAZING THINGS HAPPENED. I suddenly understood what the meditators of this world were jabbering on about. My mind grew still. I could sleep at night. I became calm, well-rooted, unflappable. The magic of BrainEv is it does all this for you. If you run visualisations or Open Focus "can you imagine....." techniques along side it, I think you run the risk of sabotaging BrainEv.
By glorious synchronicity, I flapped the Open Focus book open at the explanation for why Open Focus is so useful at delivering high amplitude, synchronised alphawaves. So I will share this with you, and others should they care to read this, as I believe BrainEv and Open Focus should not be used simultaneously.
Les Fehmi states that the idea of space, nothingness, timelessness (you know the stuff he delivers in his meditations) have a strong, long-lasting, powerful effect of switching the brain into high amplitude alpha. He runs through various body parts, i.e. "Can you imagine the space between your ears?" and Bang! the brain area responsible for this part of our body goes into high amplitude alpha. "Can you possibly imagine the space between your chin and your eyebrows?" and bingo! you start to produce high amplitude alpha in that area of your brain that handles those body parts. The result is a whole brain symphony of high altitude alphawaves as he (and we if we follow his meditation) guides us through our whole body, the area outside our body etc. etc. This certainly works for me and I am totally 'alpha-ed out', there is so much alpha symphony that I CANNOT keep alert (so he effectively shuts down my beta-chatterbox).
Back to BrainEv. If you look through the introductory videos, which I cannot recommend highly enough if you want any idea of what is going on during sessions, you will be guided through a whole range of frequences, a vast array of alpha, the whole theta range and plenty of delta too. The frequencies and depths vary with each level. So to use an alpha-inducing technique such as Open Focus may really interfere with BrainEv by preventing you from shifting through all the frequencies.
Nothing to stop you doing Open Focus outside your sessions (maybe space them well apart) - though the BrainEv crew don't recommend using two long term entrainment programs simultaneously. That is your decision. However, I think you will find BrainEv delivers such a pleasant punch over the next few weeks that you won't want ANYTHING to interfere or dilute the experience.
Enjoy your journey. I look forward to hearing how you get on. The other frequencies are fun and rewarding too, not just alpha! Have a magical journey, Pure Bliss