Pro always shows a turbocharged connection (blue bars).

If you're running basic LW then you'll only see a turbo connection if you connect as an ultrapeer, rather than a leaf. Connecting as an ultrapeer just means that you have a fast connection & aren't firewalled, so you have the capacity to handle more traffic than people with slower connections or people who are firewalled.

If you're seeing the firewall icon in LW on the Win 98 then you won't be able to connect as an ultrapeer & you won't see a turbo connection. There's no disadvantage in not being able to connect as an UP;) Being a leaf is fine.

If your XP computer isn't firewalled then other people should be able to download from you without a problem...if it was me I'd just say "yay" & not worry about the 98:D If you desperately want the 98 to have a turbo connection, just copy your Pro installer over to that, install Pro & away you go!