Can you go back to being legit?

Once you have run the file, can you delete from your computer and be fine? Even if the hack gets detected later? I only wanna try cheating for the experience, and don't wanna get vac'd if it becomes detected later.

Yes, just make sure that you clean every trace of the cheat on your computer... using ccleaner should be enough or check out this thread, running it after you deleted the client should definitly do its job http://aimware.net/forum/thread-2116.html