Hi slyword,
I do not have WindowsXP, but I am using Windows2000. I presume the steps to set the PATH variable are similar, if not the same.
Here is how I would set the PATH environmental variable on my pc:
Click the Windows 'Start' button,
Click 'Settings',
Click 'Control Panel',
Click the 'System' icon in the Control Panel window,
Select the 'Advanced' tab.
Select the button labelled 'Environment Variables'.
At this point the environment variables window would open, with 2 panes:
The first one labelled 'User variables for GRANT',
The second one labelled 'System variables'.
I normally make my changes in the second one, but I am the only user of my PC, and I have administrator rights. You probably wouldn't be able to access the 'System variables' section if you don't have administrator rights.
To change the PATH variable, either in the 'User variables' or 'System variables' section, highlight the entry labelled 'Path' then click on the 'Edit' button.
When you click the 'Edit' button, a small window opens with 2 entry boxes:
The first on labelled 'Variable name',
the second labelled 'Variable value'.
You need to add your path to the end of what is in the 'Variable value' entry box. For example, you would probably want to add something like the following to the end of the current entry:
C:/Python22;
Of course, you must put the path to the Python directory on your system. It's a good idea to end it with a semi-colon (

.
(Actually, I just noticed that the only reference to Python in my path is '
C:\Python22\.;'. I am not sure what the extra '\.' is for, but it may be necessary. I imagine it was entered automatically during setup. So, you may need to include the '\.')
Since you are using WindowsXP, and the steps might be slightly different. If so, you could just go to the Windows 'Start' menu, select 'Help'
As for what to add, for normal, everyday operation of python, the above entry with the path to the Python directory is sufficient.
Hope this helps,
Grant.