I've got a 2009 MBP, running Mountain Lion. I'm an Environmental Engineering major, and I need to run HEC HMS. So since I'm too poor for parallels, and too lazy to partition my hard drive, a fellow apple user student suggested I get Wine. I got it, and XQuarts to run X11. So HEC HMS works just fine, but later in the semester, I needed HEC RAS. So just like HEC HMS, I downloaded HEC RAS from the website, and when I installed it through Wine, i get the error Runtime error '339': Component 'THREED32.OCX' or one of its dependancies not correctly registered: a file is missing or invalid. I googled the problem, and people said to download "THREED32.OCX" and put it in the System 32 folder. So i downloaded "THREED32.OCX", and through X11, I put it in the System 32 folder. However, it still didn't solve the problem, and it still gives me the same runtime error. Is there some special way to install the "THREED32.OCX" file thing? What am I doing wrong?? Please help!