Moving stuff from one hard drive to another.

[*old-guy*]

Hi guys,
I'm a complete thicko so I don't know if this is possible. I have a 70 gig hard drive in a Blue and white G3. The Mac runs OSX 10.3.9 quite happily.
I bought another hard drive @ 9 gig that has OSX 10.2 and other apps on it. What I want to do is swap the apps over to the big hard drive but is it even possible?
Should I just mount the second drive and use the apps from there? Is that possible seeing as how there is an OS on the second drive?
To be honest, I'd rather not do that because I intend putting another big drive in to store films etc.
Any advice appreciated.

 

[Fleetwood Mac]

You should look into purchasing a USB enclosure for the old hard drive. It will allow you access all files on the drive and won't require too much hassle.