If Im correct you can copy all the iso's to your hard drive and then using nero or nti cd make you can chose an option to Create Disc from Image file ( I use NTI CD maker) . Once you write all three iso's to 3 discs you should be able to boot up with it and then install as usual .
Otherwise theres a post on the board explaining how to install it without burning the images to the cd's. I believe you can find the post here .
*thinkdigit.com/forum/viewtopic.php?t=15851
*thinkdigit.com/forum/viewtopic.php?t=15893
Hope this helps.