Thankfully there are guest drivers for Virtual BOX for OS/2 and it derivatives and they work fully on OS/2 including mouse integration, folder sharing and clipboard sharing which makes live much easier. of course you have to manually copy files and then enable the drivers in config.sys and startup.cmd which i guess is the autoexec.bat of OS/2 .. autoexec.bat also exists but its for the compatibility with the DOS and Windows 3.1 side of things.