New FreeBSD8.2 server install.

[Chris Brennan]

I've got a new machine to replace the one that died on me a few weeks 
ago and since then, I've collected and cataloged my drives of various 
sizes and I am curious if I am able to do something like a poor-mans 
LVM, I thought about gmirror but that might be tricky, since I would 
have to slice drives up according to the smallest drive I have (current 
an unmarked 40GB drive). Is there a way within FreeBSD to concatenate 
the drives into a software raid0 array?

**EDIT** 
I postponed this mail and actually got significant answers from 
freenode/##freebsd, more then I antisipated. gconcat is what I was 
looking for above and in lieu of that, ZFS, which I would very much like 
to utilize, I'm just not sure how to go about it with a hodge-podge 
collection of disks:

    1) 1x150GB PATA/EIDE drive
    2) 2x80GB Drives (1 SATA, 1 PATA/EIDE)
    3) 1x60GB PATA/EIDE drive
    4) 2x40GB PATA/EIDE drives

The machine is a P4 Prescott, 2.6Ghz Machine (32-bit CPU), like I 
mentioned, I just don't know what to do and am looking for some 
suggestions.

P.S. Currently, this machine is installed w/ the 150GB disk and I am 
sitting at the Fixit prompt because I may whipe the drive and start over 
with something else.

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