Quote - Oh, wait, I do use translate on the hip, to actually move the whole figure, for the likes of jumping animations. that's ok, isn't it ?

Yes, it's OK to use the Translate tool on the hip or Body actors to position the figures. I should have pointed that out. What I meant was don't use them to make the general pose, just for positioning the figure in the scene. Any way, that' just my opinion, do it what ever way works best for you.

Like Gareee, I have no idea how any of this stuff translates to second life. In general, in Poser for static poses you should set the X and Z translations of the figure in the Body. If you do it that way, when you save a pose, the pose can be used with the figure in any location in the scene, and when you apply the pose it won't make the figure jump to a new location, as would happen if you had set the translation in the hip. This is because Poser does not save pose data for the Body actor (I think P7 has an option to do that).

One exception to this rule of thumb is when you are saving poses for a pair of characters, and they must take up an exact location relative to each other. Another exception is in animated poses where the figure location needs to change over time. I that case you need to implement  the translations in the hip. Again, this is because Poser does not save pose data for the Body actor, and in this case you need the location data to be stored in the pose file.

Y translate is a different matter. In general yTran should be set in the hip. This is because the rest of the pose (e.g. the amount of bend at the knees) will determine what yTran is needed to place the feet (or what ever) on the floor. Unlike X or Z tran, it is necessary that this yTran data be stored in the pose file so that applying the pose puts the feet on the ground. This system may be a bit hard to get used to, but I find that it pays dividends in the long run, especially if you save and use a lot of poses.