Well, maybe an apology to SKY is due..........
Windows 98............. NO
Windows 98SE......... Technically YES, but you might find it difficult.
Basic principle is to read the XP network wizard carefully and do what it says to copy it to floppy and run the install via the wizard on the 98SE computer.
I have four PCs connected on a network into NTL, (my SKY installation is one XP XP PC wired and a laptop sometimes on wireless.)
On NTL, of the four, two were on Win 98SE, one worked after quite a bit of tweaking, but the other, despite seeming the same, eventually I gave up on and installed XP!!
Regards,
Dave