General burning?

Just a general question about CD buring, i have been burning cd's for ages now, and i have alwys stopped doing things on the computer while i burn a CD. I have an LG writer which has bufferunderrun protection, and was wondering if its ok to download and upload and stuff like that while i burn a cd or does this mess the burn up?
with buffer underrun protection (burnproof) you can usually do absolutely everything and it'll be fine. even without, unless you have a really shitty pc, you can easily do web stuff and downloads while burning.
There is only one way to find out for certain: put it to the test. If you have no CD-RW, all you're putting at risk are some cheap CD-Rs.