You've just screwed the anonimity that you hoped to keep by posting your plan on a publicly viewable web forum. My suggestion is to send these funds in several stages to a bitcoin mixer with the end destination a new address that you create seperate from your main client. Once the required amount has arrived in your single, seperated address; then pay your debt in one lump sum. Mark that address/wallet.dat for what it is, and keep it forever seperate from your main client.
I don't care if someone knows I'm doing it, as long as they can't determine the end-point of my BTC, nor can they link any of my addresses together without, well, knowing they're my addresses.
