Here's an example pic of what a chip looks like from above - you should notice the "notch" in the end and/or a dot to indicate pin one:
You should be fine changing chips in a garage as there's very few sources of static around, and you discharge naturally over time anyway.
Avoid things like carpets and nylon fleeces though, as these can really build up static - in the same way you should never pull your PC apart on the carpet!!