Boothroyd's Northampton team have won just one of their last six npower League Two matches heading into Thursday night's semi-final first leg against Cheltenham, who have won three and drawn one of their last five games.
The other semi-final sees the two in-form sides go head-to-head. Bradford have five victories and three draws from their last nine outings while Burton have won three of their last four fixtures.
The Cobblers are on the worst run, but Boothroyd is not concerned.
In 2006, it was the same story for his Watford team. The Hornets finished the campaign with just three wins from their final 10 games but overcame Crystal Place 3-0 in the play-offs before beating Leeds by the same scoreline in the final at Cardiff's Millennium Stadium to clinch promotion to the Premier League.
"You can look at form in different ways," said Northampton boss Boothroyd. "Another way of looking at it is we have won 11 of our last 12 home matches. Now that puts a different slant on things, doesn't it?
"But I don't believe form counts for much in these situations. When we got promoted at Watford we lost to Crystal Palace towards the end of the season. We had lost to Leeds as well and we still went up, so it can go either way.
"It's about having all your players fit and making sure on the day the players perform as well as they can.
"Unbelievably, I am going to have a fully-fit squad to choose from apart from Alex Nicholls, who broke his leg last year, and that is a great position to be in at this stage of the season.
"We have done very well at home this season and it's important that we maintain that, but also I've been really pleased with our recent away form. Hopefully we can now put it all together and make sure that we come good at the right time."