windows xp - How can I copy a folder with many files with integrity check?

I just got a new hard drive and want to move many of the folders from the old hard drive to the new one, but I want to make sure everything is copied over correctly.

I tried using md5summer to generate md5 sums of the original files, copied files over and then tried to compare md5 sums of both sets of files. This took ages because there are many large video files.

Is there any software I can use to make this process as painless as possible? I just need basic file integrity checking.