installing on 2nd harddisk

[Taco IJsselmuiden <taco@alliantis.com>]

Hi All,

I got a question about the installation-process:
my server (i386) currently has 2 harddisk in it:
15Gb (hda)
3.2Gb (hdc)

Because of disk-space and easy-ness, i want to re-install debian on hdc,
but want a very small down-time. Ideally only hardware-switching the
disks. This means I have to install debian while running ;))
The thing I haven't figured out yet, is installing the base-system (the
packages are easy ;)) ).
Anyone knows how to install the base-system on a running computer using a
separate harddisk ??
And any pittfalls ??

Please cc answers to me, 'cause i'm not on debian-user...

Thanks,
Taco.
---
"Regular expressions are to strings what math is to numbers." 
    - Andrew Clinick.