I'm a designer who deals with a lot of psd and ai files and it's very time consuming to sort through multiple files.
I was wondering if it were possible to use Windows Explorer's file preview feature to view my files before opening them.
You have two options:
Second, purchase a codec that allows you to preview .PSD files in Explorer. Most codecs / packages will allow you to preview many other files that might also be of use to use. Some good ones include PSD-codec by Ardfry or Fast Picture Viewer (which supports the viewing of other files as icons such as InDesign and illustrator).