There you can see that Intel provides an INF file for W2k on HM55 but no driver for the disk host:
One possiblity woud be to set the host on "IDE mode" or whatever you Bios calls it - provided this possiblity exists - and let W2k install its P-Ata drivers. Though, this is a very bad solution:
- You lose the Ahci improvements, especially the Ncq which nicely accelerates the machine through rearranging disks accesses;
- Your Seven probably uses the Ahci mode, and switching the Bios every time you boot the other OS is unbeareable.
So what you need is a non-official driver for the HM55 disk host. Check what Blackwingcat (member here) has done, whether the HM55 is one of his targets. If not, your chances are slim. If yes, you can provide the driver to W2k by an F6 diskette that you prepare and provide at the beginning of the W2k installation, or by integrating the driver on a W2k installation disk made for instance with nLite.
I can't tell whether Seven and W2k live together in harmony. W2k and Xp don't for instance (...only at the beginning, argh!) - and Seven has quite a few differences, for instance the partition table isn't necessarily what fits W2k (=Dos type). Well, members here must have experience with 2k+7.