What do you mean by 'early attempts to mount it', and 'so it mounts automatically when I boot up'? I am not sure what you would like to do, but I can probably help.
You say you want to use your first hard drive in Linux. Linux does not run in a FAT32 enviorment, unless you can do a partitionless install, which I don't recommend because if you have to re-install Windows, you'll need to re-install your linux system. RedHat and Mandrake allow you to do this. If you want your whole hard drive to be linux, and you have an extra drive, then just install the second hard drive as the slave, and copy that data onto the next hard drive. Then, you will want to install Linux on the first hard drive (yes, it's called hda). Oh, by the way, when you partition for linux, you may get something like:
/boot=hda1
/=hda5
SWAP=hda6
This will be normal. The numbers 5 and 6 indicate an extended partition. DOn't panic, as I did when I installed Linux

.
Personally, I'd recommend installing a second drive, and using <i>that</i> for linux. Because Linux is flexible, it will still work perfect. Also, it will be EASY to partiton with Linux because there will not be any data that you will need to back up. Just boot from the Linux CD-ROM, and install! Oh, and if you do this, make sure that, when prompted, you install on hdb, NOT hda. This will make your windows data go bye-bye
Another thing, do you want to dual-boot?
Which Distro are you using? That would probably help me alot. Look foward to a response, as I like to help people! Linux is probably one of the only things I can <i>really</i> help with. Anyway, good luck! Let me know, and I'll get back to you!
--maxim