dumb mouse thingy

Hi folks..lots of info here but naturally i can't find something specific.
Heres what i got. 2 PC's 1-AMD 1GZ w/ realtec NIC using WINME. #2 PC WIN98SE PIII 450. installed linksys hub and NIC w/ CAT5 cable (kept the Realtec NIC in the WINME sys.). Both PC's can see each other, no problem. What i am trying to find out is...
1) with a USB DSL on #1 PC and using the network how do i get the #2 PC to use the same DSL modem that is on the #1 PC?..ALSO
whenevr i log onto network on #2 PC the mouse gets real shaky and then goes out and the WIN98SE will not shut down
By the by this gang here offers really good help and i do want to thank you
God bless, Jim

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Proverbs 22:3