Hi Jason,
You could use a custom field by adding custom1 to your layout
https://www.ecommercetemplates.com/help/css-layouts.asp#proddetailorder
You'll need something like this in your vsadmin/includes.php
$detailpagelayout='navigation, checkoutbutton, productimage,
custom1, productname, discounts, instock, description, listprice, price, quantity, currency, dateadded, options, addtocart, previousnext, emailfriend, reviews, socialmedia';
Then in your admin add some html in the custom field, something like <img src="images/manulogo.jpg"/> and upload the logo to your images directory
You can also change the label for the custom field in the admin by adding the following to your vsadmin/includes.php
$admincustomlabel1="Manufacturer Logo ";
There's a full explanation here on the bulit in CSV upload feature to upload products and image data - https://www.ecommercetemplates.com/phphelp/ecommplus/help.asp#csv
If you need a more advanced version that includes options etc. there are a few add ons here -
http://www.dlss.ca/proddetail.asp?prod=Adv-Option-CSV
http://www.dlss.ca/proddetail.asp?prod=Adv_Category_CSV
http://www.dlss.ca/proddetail.asp?prod=Adv_Quantity_CSV
There was a product one that included quite a few more features than the bulit in one but I'm not seeing it listed anywhere.
The hover over feature isn't available but you can add a detail link on your product pages by adding detaillink to your product page layout:-
$productpagelayout='productimage, productname, discounts, reviewstars, instock, description, options, listprice, price, currency, quantity,
detaillink';
To make the detail link a button add the following to your vsadmin/includes,php
$imgdetaillink="button";

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