Hi Gents,
Likely nothing new to many of you but I thought it might help a few.
I am using Firefox browser to get this, it may work on some other browser but I have not tried.
First you require launch Firefox and install a module called: Re-pagination.
Then go to the thread you want to download:
Right-Click on the Page 2 and select Re-PaginationLoadAll in the popup menu.
The download process will start:
wait until you reach the total number of pages.
To save a bit of ressources and space you can do the same unsing the Printable Version of the thread.
Once the download is completed, just save as page, finish.
Cheers.