Question : How to merge SSI partition in EeePc

I have a ASUS EeePC with SSI disk of 12 GB with two partition C: and D. The C: partiion has 4GB and it is dedicated to Windows XP. The other 8GB is dedicated to data.  
The C: partition is too small to Windows and its updates, etc
How to merge C: and D: in just one.  I have tried to use Patiion Magic software, but seems that it understand that my EeePC has two phisical disks.
Please how to leave the SSI disk from my EeePC with just one partition (or how to enlarge the C: partion to give more space to Windows XP)?

Answer : How to merge SSI partition in EeePc

Well,
Then there is no simple way to merge your drives. Either you can install Win XP Pro .

Partially solutions are folder redirection. You can redirect some of system folders to drive D.
Folders related to user profile can be redirected using TweakUI utility.
Also you can redirect Program Files folder, however there are some warnings from Microsoft about doing so.

Also you can move your pagefile to D: , it will also increase free space.