Here are a bunch of stylesheets (for Stylish, intended for Firefox, but I guess they could be used on other browsers) for the new board layout.  They're made to work on betaboards.ign.com, boards.ign.com, and forums.ign.com.  These are intended for use with the Grey layout.  White will probably work, but Classic will be messed up, especially with fluid width, old layout, and other stuff.

Instructions

Order of installation is very important, install the stylesheets in the order they are listed.  If you don't want to install something, just skip over it.  If it's redundant, don't install it.  If you mess up the order or need to install something "in between", uncheck all of the betaboards stylesheets (right click Stylish icon), then check them in the proper order.

Stylesheets

IGN Boards - Minimalizer

IGN Boards - Fluid width

IGN Boards - Old colors and layout in threads

Intended to be used with fluid width, but it will still look okay if you don't use it.

IGN Boards - Old colors and layout on boards

Requires fluid width

IGN Boards - Tiny Search Bar

IGN Boards - Hide your icon/info

IGN Boards - Small icon

IGN Boards - Names on top

Redundant under old layout

Works now

IGN Boards - Better icon framing

Redundant under old layout

IGN Boards - No speech bubble effect

Redundant under old layout

IGN Boards - Old Poll Layout

IGN Boards - Signature Formatting

IGN Boards - Recent posts height fix

IGN Boards - Hide post stars

IGN Boards - Old Background

IGN Boards - Colored text borders

IGN Boards - Colored text remover

IGN Boards - Hide JPEG Icons and Sig Images

IGN Boards - Updated Poll/Sticky Images

IGN Boards - Break long words