I assume that you want to print the document as a booklet on your printer?
If this is the case, then I normally, process the document in XMPie on SRA4 sheet size 1 row 1 column with bleed, and then do the imposition on the rip.
Alternatively to using the RIP, there are other 3rd party imposition software that could do the trick eg Preps or Quite Imposing.
Also, if you have StoreFlow, it will come with Xerox FreeFlow core which also has an imposition module that could do the job.