Hootyowl13 Are the crashes only happening while you build, or in other contexts too? Are they only on one lot, and which one, or multiple lots? Please also let me know if the crashes are contained to Innisgreen, as there are some issues with certain lots in that world.
Please also provide a dxdiag. Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop. From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.