Well silly me! I answered my own question. Details are on page 157 of your Poser manual and page 158 shows that 'yes' there is that UVs button, that I haven't ever found any tutorials on anywhere. Hmmmmmmm. . . . because it does more than just tiling. Anyway the Grouping Tool is the Editing Tools button that looks like a dashed square with a dot in it, ( mine is the last one on the right, I guess its that way for everyone) but I've actually done most of my tiles with UVMapper too. :)