now that you have a boot screen, these are the next steps:
You must use a regular keyboard to access the BIOS. During the boot phase, you must hit CTRL+ALT+ESC (not TAB, not DEL, not F1!) That'll get you into the BIOS.
If your HD is attached and working correctly, use the BIOS' Automatic Hard disk detection feature. It is important to make sure you select the LARGE/LBA/NORMAL according to however it was set with the computer you copied the Win98 cabs from. If not--you'll experience some problems.
On a side note, I'd recommend the LBA spec (not NORMAL, not LARGE) since this spec is for large HDs (of which 4.2 GB amply qualifies). This may require you to plug the HD back into the regular computer, detect it properly (with LBA) in the regular computers BIOS, and then you'll have to re-FDISK and reformat, being sure to "FORMAT C:/S" to transfer the system files over. Then of course you'll have to copy the Win98 cabs again. After that you're set. (Sorry, not trying to patronize or insult you--just thought you and others might like to know this).
Now, back to plugging the HD into the IO... when you're in the BIOS, after it's detected, you'll want to going into the "Chipset features" on the main BIOS screen, and select the drive boot sequence to read "C only"
Save changes and exit, and you should boot just fine to the command prompt, where you can run win98's setup.
Hope that helps... good luck. I just got my V5 working about 1.5 weeks ago.