I opened it in BKBTL:
Put C.BKD (from andos330.zip) into drive C.
Press 002B enter.
Wait a bit.
When the ANDOS intro starts press any key.
A file manager starts.
Put p.bkd into drive A.
Type A: enter. (Or press F8 and press A - this doesn't work in all emulators)
Select EXE and press enter.
Select START(not MAIN.EXE!) and press enter.
The game should start.
In bk-terak-emu, booting from C.BKD stops with an error: Ошибка #6, повторить? (Error #6, again?)
With the BK.EXE included in andos330.zip: Copy the disk images into the folder of the program. In the file manager you can select P: with F8 P.
A note on controls: Instead shift you have to use control. In swordfighting you have to use space.