you have to make sure the file extensions are visible in the file name itself......ie "housepics.jpg", not just in the "get info/properties" panel, otherwise windblows wont know what app to open them with......also don't use any funky characters like slashes, dashes, underscores etc in the file names.....this causes windblows to go apesh*t too 😛
Also the disc itself should be burned as an ISO9660 format to ensure cross-platform compatability......