I downloaded and suddenly my PC sttoped running. e simply could not run anymore, was always in walk mode.
(and yes, I tried toggling trough walk mode, and many other thing.)
I closed the program, usede the "restore" function in the hak (yes, it has a restore file, thankfully) and everything went back to normal.
EXCEPT for the fact that after this run I logged off and when I logged on again, my character was a ghost.
Heretic already fixed it, and I hope there will be no more problems (and I don't really think the ghost status of my character had any relation with the hack), but here's the report.