I intended to download the newest Windows SDK, but. Woe~~ 1.3GB iso

I only need a single SignTool.exe, could anyone upload one as attachment for me please?

You've posted the exact same question on DonationCoder.com, so since I'll not allow it to be posted here you'll have to hope someone there will.

Bear in mind too that if you are using signtool.exe you'll also need to have the redistributable files for CAPICOM - requires validation.