If you have a credit card (especially visa) you'll be fine - they've dealt with this before (i did bout 8 years ago)
although I now have a degree in this area (IT Security) and I sincerely strongly advising deleting your temporary internet files regardless - stenography is pretty popular these days (thats inserting code into another file, like a picture for example) and one of the more common ways people infect you with a trojan or key logger