Yes, Pro-Line recommends that all tires with closed cell and regular foam inserts (including Pre-Mounts) have 2 holes in the tread to prevent air from being trapped in the tire.
If your kit is not specifically mentioned in the fits section for a body you may still be in luck.
Painting is an art form and it can be difficult depending on the colors and detail but we have a few helpful tools that you can use. Refer to our Body Painting and Trimming Tips portion of our website.