This one installed just as easy as everything else has so far from Compojoom!
A couple of tips for newbies though:
The folder for your Flypage is by default: ROOT/components/com_virtuemart/themes/default/templates/product_details
-which is as described in the readme.txt file, although you must understand that YOUR_THEME is refering to default/templates on your site, if you are using a standard install from Virtuemart.
Another small tip to consider if you are not seeing the comments function, is to check on the backend !JoomlaComment plugin (Other component settings), whether you have actually allowed comments to each category (hehe, yepp, I forgot this first time round). For me it defaulted to just assign the comments to the first category ONLY.
This is shown by the Include/Exclude radio field followed by the category list.
Lastly, get rid of the pre-ticked Allow Comments in the Virtuemart component, otherwise you have 2 commenting options visible on the frontend.
All in all, dead-easy, these were just pointers for newbies.
The only downside is that Virtuemart have both the Star Rating value and comments in the same radio field selection. There might be a way around this if you for some reason absolutely need the Star Rating.
I guess it took me around me 3 minutes including the FTP transfer and php edit.