Can I still use the Optical Drive if I install a SSD in my MacBook Pro?

Hello,

I'm looking to replace the standard hard drive in my MacBook Pro with a 240GB SSD, my question is, does this effect the usage of the DVD/CD Drive? As i've seen in some videos people taking that out and putting the exsisting hard drive there.

I don't want to do that I will turn that in to an extra external hard drive.

Any information would be very welcome.

Thank you,

James