Upgrading SAP 4.5B to SAP ECC 6.0 EHP 4

hi,

If we were to upgrade systems running on SAP 4.5B to SAP ECC 6.0 EHP 4 , do we have direct step where we can move up to ECC 6.0 EHP4 ?

Below is my scenario,

Source                                                                                             Target                              

SAP 4.5B on Win 2003 32bit , oracel 9.2 , non unicode                       SAP ECC 6.0 EHP 4 on Redhat linux 64  , oracle 11 , unicode.

Do we have to upgrade 4.5B to 4.6C/4.7, do a unicode conversion and then upgrade to ECC 6.0 EHP 4 with oracle 10. Finally migrate to redhat linux 64 with 11 on target server?

Just wanted to confirm if we can upgrade directly to EHP4.

Regards,

Karthick