It is not possible to convert PAHUD profiles to PT3 profiles.
There is not currently a layout manager and so the only way to edit the layout's location is to do so at a live table. If you want to experiment with other statistics and general concepts on the HUD, you can enable the Replayer HUD using the Show HUD checkbox in the bottom center of the replayer. You can then configure the HUD there and all you'll need to do at a live table is right click the boxes and drag them to their final locations then PT3 Icon -> Save Layout to save the location for the future.
To split the stats up in the way you want, you'll need to create multiple groups - each PT3 HUD group is its own box. You can tie different popups to them (or the same popups if you prefer). Please see the
Tutorial: Managing Hud Groups for more on the how the Groups system works.
And in general: have you looked at your
FAQ forum? We have topic-specific information there which may be of use to you.