Encrypted Files From Previous Install

I have two hard drives, one of which has a lot of files I wish to hold onto. The smaller one had Windows XP on it, but me not being to smart about my internet connection, received a lot of trojans and such. So, I disconnected my larger drive and reformatted my smaller one to re-install Windows XP. I forgot that I had some files that I had encrypted. My certificate thumprints and aliases are different so I am not able to decrypt them. Am I totally lost or is there any possible way to retrieve them?