If this is real it seems nice.
However I would take care with it, the virus scan he linked doesn't show up and Virustotal gets 2/42:
.
2/42 doesn't sound dangerous, but you should never execute software that has more than 1 result (In this case I am pretty sure there's something strange with it, Ikarus is one of the very best softwares when it comes to detecting malware automatically).
This does not mean that this hack isn't working, it just means that I am pretty sure that this program is a trojan dropper.
@Kr4ck_HaCk: I'd be happy if you pm me about it and convince me it's no malware, so i can edit this post.
@botterje: Teleporting and runningspeed are quite useless on official server ( you just get teleported back), rangehack won't work at all I think. Others should be quite save to use as long as you don't use them near other players.
Best regards,
Rajin