I think if you don't select anything, then it will be a standard install. If you're unsure, leave it in. I think I ticked (unticked?) about two thirds of the options and have never had a problem. I do know I won't be able to use a printer with reinstalling, for example, but then I don't own one nor have the room for one, so it's fine for me to remove printer support. For many people, that would be essential. Basically you might have to do a lot of reading to really understand the control nLite gives you.
I've not used TinyXP but that may be the more sensible option if you're aren't cenfident. Alternatively, play with nLite, create an image, mount it to a virtual drive, then install it to a virtual machine and do everything you can think of doing to it. If everything still works, burn it to disc and try for real, or try removing more then repeat, if not, start over.