Hello Mark,
Here is my step by step guide about the parameters as icons.
If somebody has a question you shouldnt type it again and agian and again and again...

Product type parameters as icons on the product page
So this guide is made for Mark Callf's Product Types Modification to show the product type parameters as icons.
First make a new product type in the VM admin, call as "probetype" and set its flypage "fly_type_new" (Use the name in the form without the .php extension!)
Attach it to some products.
Second lets make some parameters for this product type (text based triggers), call them "parameter1" and "parameter2".
So we have now one product type with two parameters ("probetype/paremeter1" and "probetype/paremeter1") the values shoud be: "yes;no"
OK we have cleaned the backyard..

So now make the fancy things!
Insert in your product flypage the product type tag: {typename}, now in our example it should be {probetype} !
Copy the attached product type flypage to /admnistrator/components/com_virtuemart/html/templates/ !
After this, name the parameter icons to "icon_parametername.png", now here call them "icon_parameter1.png" and "icon_parameter2.png" !
Put them into this folder: /components/com_virtuemart/shop_image/product_type/ (Our firstime guests should make this folder: "product_type" in the "shop_image" !)
If you would use a "NEW" icon in the product page, just name it as "icon_new.png" and copy to the same place as the others. If your product was born in the last two weeks, the nice "NEW" icon will appear.
Now sit back and browse to your product...and for sure press F5 to refresh your page..

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I hope I didnt forget anything and could help your work!
Cheerz,
B.