Can you make OSX mount just certain partitions when you connect an external HDD?

Question

I have an external HDD with 4 partitions.

My question is the following: is there a way of telling the OS to mount just two of them (One FAT and one HFS+) when I connect the HDD? It is rather annoying to have 4 "disks" connected on the finder, and it makes ejecting the drive a test to my patience.

I would appreciate your suggestions. If it's impossible I guess I'll just have to fiddle around and get everything in 2 partitions... :/