Hi,
As has been said, W2K has chkdsk rather than scandisk. When you try to run it on your boot partition, it will tell you that it can't access the drive because it's in use by another process, or some such. It asks if you wish to schedule chkdsk to run during the next boot. If you answer yes, then the next time you boot you'll see a 10 second countdown before the process begins. (If you hit a key during that time, you can cancel the chkdsk run.) You can read up on the command line options by opening a command prompt and using the "chkdsk /?" command.
As kyoshozx said, W2K already has DirectX 7 by default. I've upgraded to DirectX 8 with no issues. (Be sure your BIOS and all of your drivers, particularly video, are up to snuff before you upgrade, though.)
It's actually possible to copy the MSCONFIG executable from a Win98 machine and run it under W2K. I don't recommend that, however. There's a freeware utility that does a MUCH more effective job of handling startup processes than MSCONFIG. It's Mike Lin's Startup Control Panel, and you can get it
here. It allows you to enable / disable / temporarily delete / permanently delete the startup reference for any non-service process on the system.
You control the startup conditions for services from the Administrative Tools' Services applet.
You mention that you "loved tweaking that program". But it seems as though you're not yet familiar with your new OS. I heartily suggest that you use caution before you start tweaking this OS. It's highly customizable, but it's also full of logic traps for the unwary. It's unlikely that you can do any harm by fooling with non-service startup processes. But if you start disabling services or editing security features, you can wind up seeing some big-time malfunctions or even being locked out of the system, especially if you're using features like the NTFS5 file format or data encryption.
But if you thought Win9X was customizable, wait until you see what this puppy can do. Of course the tweaks in this OS are more functional than visual, but still there are a lot of toys to play with! Have fun!
Regards,
Jim