Hello Eolus,
yes, of course you can make a recording for yourself for your own private use, no problem. Remember to make some breaks in phases when you visualise things, talk with your holy guardian angel etc.
We also offer a recording on CD of this meditation, with breaks in all the right places, for 15 € plus postage. (There are further recordings available, but so far in German language only.)
However you can make your own recording for private use nevertheless, of course. In this case, please mind the following, and I know you are probably already aware of this, but maybe not everyone who reads this:
Of course no-one is allowed to sell or publish their recording of the meditation, because Salomo Baal-Shem owns the rights of the Inner Temple meditations.
An alternative to a recording is to split the meditation in parts, e.g. at first only enter your Inner Garden, and then return, to get familiar with that part, and after a few meditations enter the Inner Library and get accustomed to it in a few further meditations, and then finally also enter the Inner Sanctum.
Both ways are fine. You are welcome to do either and drop us a note in the meditation forum about your experiences, if you like!
In Light
Andrea