Replacing existing Linux, existing dual boot

[Moltke]

The tool you are recommending, EasyBCD, looks like it can be useful once I know what I am doing

EasyBCD  as its name implies is really easy to use. Here's a nice-uncomplicated tutorial which explains how to use it: https://ubuntulinuxx.wordpress.com/2013/...windows-7/ It's about Windows 7 but process is the same, you just have to select Windows XP from the menu.

The forum postings you pointed me to with your link appear very complex to the uninitiated

I only wanted to know that dual-boooting Linux Lite with another Linux distro is not easy task, I didn't want you to understand every piece  of it - I don't -  but that. Maybe I shoud've said so before.