First the thing about virus/suspicious things, I have used the tools on the rar and i dont have my pc infected in any way(at last thas wath i think

), but allways its good have an AV sofware and firewall instaled just in case... I think some avīs in the scans dot like the cracking tools, that happen before to me with some tools for web cracking so i think its the same here, other reason are the packers.
About the "virus" in agent king, this comes whit the program itself, you can scan the exe in anantasia post an you will get a warning about vipre. And i dont think that if you change 11 instructions in the exe you will implement a new virus

.
In any way I will warning about the use of the tools.
I will answer the questions later, I gtg for now.