A quick search finds me the perfect tool for XP. ISO Recorder. After installation I was two clicks away from burning a CD from an ISO. No heavy lifting required.
The only gotcha is that if you're running XP SP2 you need to install the beta version - anything before SP2 requires the original version. Other than that, it's just the thing for quick burning of ISOs to CDs. And the best part was that it was F R E E. So check out Alex Feinman's ISO Recorder if you're looking for a down and dirty, easy to use ISO to CD burning tool.