He said: "We'll be looking to frustrate them to start with, then you never know what could happen. We could get a result.
"The game with Gretna showed what expectancy does - by 25 minutes, passes can be going astray and the fans think you should have scored by then.
"Queen of the South are waiting in the semis and it's a great incentive for us to get through."
The 34-year-old has been dogged by injury and has only managed 10 league starts this season. He is expected to feature at his old club Celtic tonight after coming off the bench in Saturday's win over Gretna.
"They have been niggly things rather than major injuries, which can be hard to deal with.
"Having to watch games like the ones against Bayern was tough because I came up here for those sort of games.
"I just want to play and I'll keep going until I feel I can't contribute."