Firstly, no Windows version earlier than Windows 10 will be able to see the second Fat partition, unless extra software is loaded. Secondly, Linux in general and Puppies in particular have had the ability to read from and write to NTFS volumes for a long time. I used to do this all the time in years gone by, from various Puppies, including Slacko. I never noticed any problems in doing so. I became wary of this later, when I found some comments on the web that this might corrupt NTFS. However, I now believe that this might have been a reference to the early implementation of NTFS in older Linux kernels, which was not very good. By the time I was using Slacko, at least, the NTFS-3G userspace driver, using Fuse, was in the newer Puppies. Apparently NTFS-3G is reliable but slow. Now however, there is a still newer NTFS3 implementation in Linux kernels from version 5.15 onward, which has passed Linus's scrutiny. I imagine that it is now safe for us to read/write NTFS volumes directly from Fossapup, since it has a newer kernel.