Thanks for the responses. I watched some videos and it does not seem tough at all! Is the Intel X25M a good SSD?
Is it difficult to re- install software onto the SSD after the install?
Would this cause me to lose any data on the current HD after disconnecting it? (plan to use it as USB external)
Not at all, as long as all your data fits onto the new hard drive. If you turn the old internal drive to an external one then it is very simple indeed: Open the MBP. Remove the old drive. Put it into the external case. Put the new drive into the Mac. Close the Mac. Plug the external drive into the Mac and reboot - the Mac will boot from the original drive which is now external.
Start "Disk Utility". Make sure that the internal drive is formatted as "Mac OS X Extended (Journaled)". Then click on "Restore". Drag the old hard drive onto "Source" and the new drive onto "Destination", then click on "Restore". That will take a while. When it's done, eject the external drive and reboot. Enjoy.
I'd leave the external drive unchanged for a week or so, because if something is wrong with your new drive, it will be most likely to fail within the first week. After that, reuse the external drive any why you like.
And you should have a Time Machine backup of your data.
I purchased the OWC kit which came with a external case. I placed the new drive in the case, and ran time machine. Once it was complete, I then switched the HD inside the MBP with the new HD inside the case..
How is this not a clone?
Time Machine backup is not a clone. Time Machine uses a special format that allows it to store dozens of different versions of your hard drive (the state right now, one hour ago, two hours ago, ..., 1 day ago, 2 days ago etc. etc. ) in a very space efficient way. You can recreate the original data from a time machine backup, but a time machine backup is not the same as the original data. See above for the easiest way to create a clone.