STO Between plant of two different companies

Dear Guys

Let me know whether it is possible to create STO with delievery and billing between plants of two different companies under the same client.

My client is xxx

Company-1 is AAAA and company code -1 is aaaa

Company-2 is bbbb and company code-b is bbbb

If possible let me know relvant customization other than regular assignmens.

RGDS

B.Jaganath