Access Windows XP on old harddisk to uninstall program

Hello all,

I need some advice.

I recently replaced my old harddisk to a new harddisk. The old harddisk has windows xp home and other programs installed.

I did not format the old harddisk, I only took out the old harddisk and replaced it with a new harddisk. I then installed windows xp home to the new harddisk.

While I am installing programs on the new harddisk, I discovered that one of the programs do not allow me to activate the program license because I have previously activated the program on my old windows. I need to do a proper uninstallation to release the license, then I can activate the license of the program in the new harddisk.

My question is, can I take out my current new harddisk, replace it with the old harddisk, boot up as normal into the old harddisk windows, uninstall the program inside the old harddisk, then replace the old hardisk with my new harddisk again.

Will I be able to access the old windows on the old harddisk?
Will it mess up my current windows/programs settings?
Will my current new harddisk windows be able to work as normal after accessing the old harddisk windows?
I thought of accessing the old harddisk as a slave, but I do not know if it is possible to access the old harddisk and do a proper uninstall of the program?
Is there any better way of uninstalling the program on my old harddisk?

Thanks in advance.

Yes, the old hard drive is removed 'as is' with XP installation, MB drivers, all program files and data intact.

be sure to remove the active partition status from the old drive

Uninstalling the program from the old HD won't effect the previous activation of that program. It's still been activated. If they aren't both in use at the same time, there shouldn't be any conflict. There should be a support number to call to get the lock removed. This is what happens for most microsoft products that have license limits.