FYI the Board3 Portal was recently updated from 2.0 to 2.0.1 and I'm using it my self. I wasn't hard to install the portal and I've already get it to work with 3 installed styles
here.
Here is instructions of how to get the portal working with other styles than prosilver and I know your DVGFX style aren't there, but it could give you some hints of how to do things.
I know this is a little off topic but I can give you all edit files for prosilver that's required of how to get a post profile from the right to the left in posts, UCP when using PM. Also here is some useful
information about the changed code that took place when upgrading 3.0.10 to 3.0.11 when it was released, because I
notice it and pointed it out so now is there a
remark (see section 8) about the changed code when upgrading phpBB. Please note that's only for the phpBB3 3.0.11 version, but I'm not sure if you can use it with an older setup so use it at your own risk.
Just upload it to /styles and overwrite all files when prompted but backup existing files first.
Btw... the ABBC3 mod was also updated which I use without fuss and here can you
download it, but I think you need to update ABBC3 because the YouTube BBCode is now outdated (obsolete?) and have been replaced with a new BBCode called BBvideo that has all previous video BBCode video tags included in one BBCode tag.