This ivy was created usign Ivy Generator (freeware) and converted for use in Sketchup. It uses the .png file from Ivy Generator. It isn't the best mapping/modeling by far, but It should be adequate for use in Sketchup; anything more complex starts creating issues with slowing Sketchup down due to high polycount. I'd recommend copy/pasting it to fit where you need, or deleting portions to fit around windows.
Thanks for the ratings!