Good job on sticking through the hassles, hj2k_x.
It's very odd that the 32-bit version of 7.10 wouldn't install on your 5200+. Hopefully you'll be fine with the 64-bit release though. Usually the only issue is limited availability of 64-bit applications.
On to your bootup issues. As stated, the BIOS really should be allowing you to choose which specific drive to boot from (and not simply "hard disk"). You'd actually stated previously that
Assuming that you absolutely can't set it in the BIOS, you can always enable Vista's own boot-menu, and add Linux to that. This is simply an alternative to booting with Grub's menu. You'd need to do a little reading to figure out how to set it up.
In fact, it seems that Grub was not placed in your Vista disk's MBR, which is a good thing IMO. I prefer to have the Windows disk left intact. Then install Linux on it's own disk, with Grub there and the BIOS set to boot from this. Then add an entry in the menu for my Windows disk.
If you aren't able to force your BIOS to boot from the IDE disk, then you'd do the reverse, by adding an entry for Ubuntu in Windows' boot menu
It's very odd that the 32-bit version of 7.10 wouldn't install on your 5200+. Hopefully you'll be fine with the 64-bit release though. Usually the only issue is limited availability of 64-bit applications.
On to your bootup issues. As stated, the BIOS really should be allowing you to choose which specific drive to boot from (and not simply "hard disk"). You'd actually stated previously that
Currently the BIOS boot sequence is CD-ROM > HDD1>HDD2 iirc.
Assuming that you absolutely can't set it in the BIOS, you can always enable Vista's own boot-menu, and add Linux to that. This is simply an alternative to booting with Grub's menu. You'd need to do a little reading to figure out how to set it up.
In fact, it seems that Grub was not placed in your Vista disk's MBR, which is a good thing IMO. I prefer to have the Windows disk left intact. Then install Linux on it's own disk, with Grub there and the BIOS set to boot from this. Then add an entry in the menu for my Windows disk.
If you aren't able to force your BIOS to boot from the IDE disk, then you'd do the reverse, by adding an entry for Ubuntu in Windows' boot menu