Current Setup:
iPhone4 A Sync to PC1 with iTune Account A
iPhone4 B Sync to PC2 with iTune Account B

Over last few months, iPhone4 A and B purchases some apps and songs separately.

What I want to achieve here is:-

1. iPhone4 A Sync to PC1 with iTune Acount A - remain no change
2. Move iPhone4 B to sync with PC1 without losing the purchased apps and songs
3. Change iPhone4 B to use iTune Account A

Questions:-

1. Checked apps forum, mostly mentioned creating 2 windows user or new iphone user.
And I don't want to create 2 user login on my windows.

2. How to move those purchases from iTune Account B to iTunes Account A?


Any help will be greatly appreciated.

Thanks.