I do remember a peer-to-peer transfer program that
used a "reverse" parallel printer cable, typically colored yellow.
Check around: that might work for you.
Also, if this Windows 98 machine is connected to the Internet,
you could also FTP all the files to an ISP, then download
that same data set to any other machine that's also
connected to the Internet.
PATA/IDE DVD burners are really cheap now:
we've replaced our older DVD burners with LG models,
and they are working very well for us.
Lastly, 10/100 Ethernet cards are a dime a dozen now,
particularly if you can find a "boneyard" of used PC equipment.
The ones for PCI slots still work fine, because the bandwidth
of PCI slots is just enough for a Gigabit Ethernet card;
thus, 10/100 cards work fine in legacy PCI slots.
A lot depends on just how much data there are
MRFS