You could either say "Ledsen för exporterandet av", meaning "Sorry for the exporting of", or "Ledsen för att ha exporterat", meaning "Sorry about having exported". If you need to use the present tense, you need to add a personal pronoun. Like "Ledsen för att jag/vi exporterar", meaning "I'm sorry that I export".
I'm not sure if you, by "den Napsters knullare" mean the fucker of Napster/Napster's fucker or "the Napster fucker". You could go with "Napsters knullare" or "knullaren av Napster", (no "den" is needed) or if you want to say "the Napster fucker" you should write "Napsterknullaren".
If you want to put a "this" in front of it, just add a "denna" in front of it, for example: "denna Napsterknullare", however you shouldn't write "denna Napster's knullare" if you want to use the possessive form. In that case you should go with "denna knullare av Napster". When you use "denna" or "detta", the following noun needs to be in infinitive, so you say "This Napster fucker", rather than "This the Napster fucker", i.e. denna Napsterknullare instead of denna Napsterknullaren.
Short and concise. :/