Cut the panel at 5 cm off the edges. Note that the rest of it is hollow as you move further into the center of the panel. It should leave you with two pieces — one for the back and one for the front of the cabinet.
Be careful not to cut off any of the mounting holes in the middle panel. You will still need them.
Paint the visible wood and mount everything like the instructions tell. You can use a drop of glue to stop the middle pillar from turning.
Jules Yap started IKEAHackers.net in 2006 as a personal blog to showcase the most impressive IKEA hacks from all over the world. Since then, she has learned a lot more about power tools and DIY. Her site has helped thousands modify IKEA furniture with step-by-step tutorials, craft projects and home styling.