Just dropping by to say that none of the links are working for me. Might be a problem with mediafire currently or something else. I remember them not working earlier either.
While they count as half for DoS [and so would for pushing yourself on strength], that's actually a bonus, given in addition to boosting the bonus without changing the % chance of a base success. They do count fully for other calculations, such as damage, movement and all that, so wouldn't it also apply to carrying?