If you use the BWPFixpack in the download folder, it should work fine. Some mods will not be patched, because they have been updated. During the summer i tested the PI and made some BGT installs. They work fine, but i didn't play much with them.
So if you prefer the PI, run the Fixpack in the download folder. If you use an old WeiDulog, you should check, if some mods has changed component numbers.
The BWP PDF is a very helpfull guide
Hopefully my english isn' t to incomprehensible.