Now, I noticed that there was a question about how to convert the infamous plastic High Elves. Having done that a lot, in the beginning to failure and then more recently to great success, here are some things to keep in mind.
Swordsmen-
1) The shoulders must be cleanly cut off, otherwise your model has no hope. Cut right up against where the cloak wraps around the shoulder.
2) Don't be afraid to break the sword in half. If you don't, you'll never position the hands correctly.
3) Due to where the shoulders are positioned on the model, the right arm will have to be, at least, theoretically, higher than the left. Ideally it will stay at collarbone-level or higher. NOTE- while this is not necessary, it does help to balance the shoulders of the swordsman, as the right is higher than the left.
Archer-
Considerably easier, the main things are the right arm- take the whole thing off and re-model the armor if you want a different pose, for the left arm, once again, break the shoulder clean, then cut it in half and re-model the chainmail.
But above all, get creative.
Best of luck!