I think I'm pretty safe.....I was baptised as an infant (sprinkled), and immersed as an adult. Seriously, though, I don't think mode should be a huge issue. As long as one is baptised, that should suffice. The Lord actually actually speaks of sprinkling water in Ezek 36:25. I don't doubt that immersion was practiced as well. Argueing over mode I think misses the point. As long as baptismal regeneration isn't taught, I see no problem with baptism by sprinkling, pouring, or immersing.

2Pe 1:2 May grace and peace be multiplied to you in the knowledge of God and of Jesus our Lord.