I can swear I've seen an illustrated guide on how to find the addresses for DVARS in here somewhere.
Although I'm not sure what exactly is triggering the VAC.
If it's just the fingerprint of cheat engine, you might have some luck taking series of dumps of the memory using userdump.exe and then loading them in cheat engine after closing the game.
(basically open an administrative console, type in "userdump <pid>" to dump that pids memory)
Just woke up, don't wanna cross any rules.. Don't remember the link policy.
If userdump is not included in your version of windows, google "User Mode Process Dumper Version 8.1"
Go for the microsoft.com result
Haven't tried this myself, and the "better" alternative would probably be using ida pro, but alternatives are good, yes? =)