You can copy your entire installation CD via the network to your laptop.
Put the entire CD contents eg. in a folder called c:\xp
Provided you have enough space available on your hd, installation can be
initiated from within windows98 by browsing to c:\xp\i386 and then
double-clicking winnt32.exe
From there on everything works as if initiated from CD.
If you can afford it, leave the structure c:\xp in place after installation.
The setup process 'remembers' where it was installed from and will point you
there automatically if you need to add stuff later on.