Lil' Dave said:
From the git-go, in windows setup, you can do this. Initially partition
part of the hard drive for XP and apps. Leave the rest of the hard drive
alone. When done installing XP, partition/format the remaining part of
the hard drive with disk manager. You can't do it this way if XP is
already installed. Then you need a 3rd party partitioning software.
Things are different if you use factory recovery software for XP install.
Things are a bit different if XP is already installed. If you mean you
are referring to 2 physical hard drives, things are different somewhat as
well. Give some details if so.
And to continue Lil' Dave's remarks once you have set up the second logical
drive (partition and format the remaining...) make sure you set My
Documents, the system temp location and any other default data locations to
the second drive. If you don't the hidden files and temporary files that
are used will bloat the OS/Programs drive and could later cause issues with
no room for the OS. Depending on the number of programs to be installed, I
would recommend a minimum 30 GB OS partition and 50 GB data partition. If a
lot of programs are to be installed you might consider increasing the OS
partition size.
To change the location of My Computer to the second drive follow these
simple instructions:
1) Open My Computer.
2) Right click on My Documents and from the sub-menu select properties.
3) Change the target folder path and Apply.
For all the other defaults you will either need to do a search (Google) or
from within a program's help files to determine how to change the default
path to the data files they create.