I'm trying to install the module "additional customers fields v2.55" and I really don't comprehend some of the installation instructions. I'm not a programmer, I know zip about php, and I have no idea what I'm doing.

"Simply upload all the files, from this ZIP package, - except for the following ones:" (list of files snipped)

"Use a comparing tool software for the listed files above."

"Once all the files has been uploaded successfully + compared from the listed files above with yours:"

What does that mean? What's a "comparing tool"? Where do I get one? What do I do with it? What am I meant to be comparing - the module's files with the versions already on my server (which I have indeed downloaded and backed up)? And if so, what differences am I looking for, and what do I do when I find them? After the files have been "compared," do I upload them *then*? Googling for comparing tool software just gets me a couple of posts on these forums that leave me none the wiser.

"Note: All paragraphs that needs to be added to your files, from the listed files above, are identified, with this title MOD name, from the beginning to the end."

Utter gibberish to me, I'm afraid. Where are these paragraphs that need to be added to the files?

I beg your indulgence. I'm really lost. A recent server move from a Windows server to a Linux server made my old cart software inoperable, and we don't have any money to buy a new cart or have a professional set it up (we're a very very broke small theater). Thanks.