Right here goes
Hook phone up to itunes
click on frilly's iphone
There will be headings, summary, info, apps,tones.
click on apps
Scroll down to just below where all apps are shown and double click ringtones
A list of tones you have made via the ringtone app will show up
Click and drop the tones you want into the left hand column under library
Go back tones (next to summary, apps etc)
It'll show the tones you dragged and dropped
select the ones you want and sync the phone (click apply bottom right on screen)
When done go into settings on phone, sounds, ringtones and tick which one you want.
Phew, does that make sense?