I download a pack with Openmsx and more laserdiscs, the c-bios appears, as in Bluemsx, but how do I start the game? There is also a boot script, but I don't know what to do.
Anyway, what you can do is:
1. Download and install the official openMSX 0.15.0
2. Get the systemroms.zip archive
3. Unzip in share/systemroms as per the openMSX manual
4. Run the pioneer PX-7 with the laserdisc of your choice, as per the openMSX manual if necessary