I need more VRAM for an upcoming amazing game titled Watch_Dogs. I have Parallels with Windows 8.1 Pro, but there's one problem. The game need 1 GB VRAM and I only have 512 MB. I would like to allocate 1536 MB to VRAM from my RAM and from what I've read, there is no virtual BIOS in parallels. I would like to know if there is a safe way to allocate that VRAM to my general iMac. Thanks in advance.