Trying to run disk cleanup and disk defragmenter via Task Scheduler

I have set up the task scheduler to run the disk cleanup and disk defragmenter when I am not there. Unfortunately, I have to click on a button on both functions in order for them to run. Is there anyway that I can bypass the button and just have the functions run automatically?

 

Windows XP comes with a command line defragmenter that you can use. Just create a batch file and schedule the batch file to run. I use Diskeeper but before I had it, I used this method and it works. Have a look here. There is a command line counterpart for a lot of the tools in XP. I believe there's one for disk cleanup too but I'm not sure. I'll have to dig a bit.

 

Here's some info on the command line disk cleanup tool. You can create a batch file for it too and run it from task scheduler.
How to Automate the Disk Cleanup Tool in Windows XP

 

Here's an article that explains much more about the command line defrag tool and how to use it. The page was down before so I didn't post it then.
Make Windows XP Self-Maintaining