According to the HighPoint website, the Rocket 133SB uses the HPT302 chipset http://www.highpoint-tech.com/USA/r133sb.htm. I searched the kernel source tree and found the appropriate driver for you.
Code:
james@0[k]# grep -R -i -n HPT302 linux-2.6.10/drivers/ide/pci/*
linux-2.6.10/drivers/ide/pci/hpt366.c:125:              case PCI_DEVICE_ID_TTI_HPT302:
linux-2.6.10/drivers/ide/pci/hpt366.c:126:                      class_rev = PCI_DEVICE_ID_TTI_HPT302; break;
linux-2.6.10/drivers/ide/pci/hpt366.c:153:      } else if (hpt_minimum_revision(dev, 6)) {      /* HPT302 */
linux-2.6.10/drivers/ide/pci/hpt366.c:154:              mode = (HPT302_ALLOW_ATA133_6) ? 4 : 3;
linux-2.6.10/drivers/ide/pci/hpt366.c:377:              hpt302_tune_chipset(drive, speed);
linux-2.6.10/drivers/ide/pci/hpt366.c:1297:     { PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT302, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
linux-2.6.10/drivers/ide/pci/hpt366.h:405:#define HPT302_ALLOW_ATA133_6 0linux-2.6.10/drivers/ide/pci/hpt366.h:445:              .name           = "HPT302",

james@0[k]# grep -R -i -n HPT302 linux-2.4.28/drivers/ide/pci/*
linux-2.4.28/drivers/ide/pci/hpt366.c:197:              case PCI_DEVICE_ID_TTI_HPT302:
linux-2.4.28/drivers/ide/pci/hpt366.c:198:                      class_rev = PCI_DEVICE_ID_TTI_HPT302; break;
linux-2.4.28/drivers/ide/pci/hpt366.c:225:      } else if (hpt_minimum_revision(dev, 6)) {      /* HPT302 */
linux-2.4.28/drivers/ide/pci/hpt366.c:226:              mode = (HPT302_ALLOW_ATA133_6) ? 4 : 3;
linux-2.4.28/drivers/ide/pci/hpt366.c:452:              hpt302_tune_chipset(drive, speed);
linux-2.4.28/drivers/ide/pci/hpt366.c:1446:     { PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT302, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
linux-2.4.28/drivers/ide/pci/hpt366.h:407:#define HPT302_ALLOW_ATA133_6 0
linux-2.4.28/drivers/ide/pci/hpt366.h:475:              .device         = PCI_DEVICE_ID_TTI_HPT302,
linux-2.4.28/drivers/ide/pci/hpt366.h:476:              .name           = "HPT302",
This means that the hpt366 driver will work in both the 2.4 & the 2.6 kernels. You should probably compile the hpt366 driver not as a loadable module but instead into the kernel itself.
I hope this helps.
James