Very interesting old game - would be great this to be converted for modern PC.

Yeah just emulate it.

i thought all the roms and emulators had been shut down by usa/japanese corporations.

It had a PC version. Unfortunately, Sony is sitting on it (and everything else from Psygnosis), so the chances of it ever coming back are very low.

you would think so.

I have also been thinking about Overboard/Shipwreckers recently because of the new game coming out in May from the Italian studio 3DClouds: King of Seas.

It seems to me that the King of Seas is heavily influenced by Overboard/Shipwreckers! arcadey style. As it seems you sail your ship around and take over towns and have weird weapons and encounter strange things in much the same manner as in Overboard/Shipwreckers.

I do hope it comes to Gog as I would very much like another pirate game in the same style.

this is what someone told me. have they or not?

Many have tried and failed and this someone either lacks basic search engine use skills or you do:

https://lmgtfy.app/?q=playstation+1+emulator

beyond this you have to discover for yourself.

A simple Google search reveals it seems to be available for download on at least one site. Just search for "overboard pc" and it should come up.