Compared with the previous Hyperion Pro driver package, version 5.00A, this version does include the IDE Filter driver, V1.20D. For Win9X/ME/2K the IDE filter driver is needed to support UDMA 6. The IDE Filter driver is not needed for WinXP SP1 and later Microsoft operating systems. 

Version 5.04A includes the following components:

INF V2.50A
AGP V4.43h
RAID V4.30H
IDE Filter V1.20D

Since the Hyperion Pro package includes SATA/RAID drivers whilst the Hyperion 4in1 package does not, the extra contents makes the Hyperion Pro package over 5MB larger than the Hyperion 4in1 package. Therefore if you are not utilizing a VIA SATA or RAID controller in your system, the Hyperion 4in1 package may be a better download choice.