Hi Cesco, thanks for your support.
I don't think I'm quite following you here. If you want to use this rom file on a real MSX of course you will have to either build your own physical cartridge or use a flash device - this goes without saying. Also, the total size of the rom image is not relevant in any way (that's what mappers are for after all).
The sentence above refers to the fact that the game was designed to run on any MSX computer no matter what their specs, even those with only 8Kb RAM which was the absolute minimum for the standard. I'm pretty sure your MSX1 will run the game just fine.
Hope you enjoy your stay at the suites!