Scripts are text files that are process by Photoshop's Plug-in scriptingsupport. Script are not compiled into 32bit or 64bit machine code. Droplets executable are made by the user to run an action which get embedded into the droplet on the files dropped onto the droplet. I would suspect that if action has a scripts steps the scripts may be encapsulated into the droplet with the Action or the script must be installed in the Photoshop version that will run the droplet action the photoshop install used to create the droplets.exe.
I have never see any reference about there being 32bit and 64bit scripts. I have installed 32bit and 64bit Photoshop and Photoshop Plug-in. I have only seen a single scripts folder and one version of Adobe plug-in Script like Fit Image.