Bump. Re-bump. Bump.
Would I help if I said No? for everyone?
I think your question has been answered.
Ps. Sorry to sound rude but I went through this awhile back myself. Couldn't find anything free besides VOIP/all its clones. and like you said they don't work for long.
PPS. installing VOIPbuster again, with a different name DOESN'T WORK. They must log the IP or something...
also using VOIPbuster programs that are named different but still VOIPbuster network doesn't work either =X
And costello is lucky because I hear in france VOIP is offered by ISP. In the states I haven't heard much of that...