Yeah it's really pretty easy. Cloth and a wide flat-head screwdriver will do the trick. I've heard that sometimes the glue has to be melted using a hairdrier but I've not had this problem.
One thing to bear in mind is that I got a replacement (brand new) roundel off eBay. I checked the size with the seller and it was the correct diameter so I went ahead and bought it. No problem. But it must have been a later badge which was perfectly flat on the base whereas the original, scratched one was curved slightly to fit the hood AND the pins holding it in were too thin for the holes. So I had to use something to stick it down properly as, with the smaller pins, it was loose. The solution was kind of ghetto, but i coated the pins in gasket sealant, rubbed a little into the holes and fitted it on a sunny, warm, day. Now the badge is held in solidly and has not come off depsite repeated high-speed antics. But it seemed more of a setback when I got this badge and realised it wasn't a perfect fit.
Gone but not forgotten: '87 UK 318... Carb madness!
Currently: '90 UK 525i completely stock
"Heaven for the climate, Hell for the company."