Create 20 minute audio track for slideshow.

I've created several slideshows intended for visualization and meditative use. So basically, there are images and text with an audio voiceover. I need background music to play at a low level that is a mixture of inspirational, relaxing, and pleasant.

Needs to sound like the following with the same breakdown in time:

Intro 3 minutes: http://audiojungle.net/item/positive-movement/1301958?sso?WT.ac=search_item&WT.seg_1=search_item&WT.z_author=brownhousemedia

Part II 5 minutes: http://audiojungle.net/item/solidbeats-clear-blue-skies/8230?sso?WT.ac=search_item&WT.seg_1=search_item&WT.z_author=Solidbeats

Part III: 5 minutes: http://audiojungle.net/item/latin-attitude/3007144?sso?WT.ac=search_item&WT.seg_1=search_item&WT.z_author=musicforyourmedia

Part IV: 5 minutes: http://audiojungle.net/item/meditation/978014?sso?WT.ac=search_item&WT.seg_1=search_item&WT.z_author=KajinDetier

Part V 2 minutes: http://audiojungle.net/item/happy-days-are-here-to-stay/484531?sso?WT.ac=search_item&WT.seg_1=search_item&WT.z_author=timmcmorris

I realize these instructions may have been a bit confusing, so feel free to ask for elaboration if you require it. Again, we need this audio file to come out to 20 minutes (we can use mediafire.com to transfer) and the transitions between the different styles must be clean and unnoticeable.