A link in the Chain?

Is this link possible by any chance?
The system consists of three computers with a single
wireless lan card and the two computers on either end do
not have access to one anothers signals?
So, Comp2 acts as a 'data handler'?

[ADSL]
^
|
v (isc) (isc)
[Comp1](Wifi)))) (((Wifi)[Comp2]Wifi))) (((Wifi)[Comp3)))

where internet is shared,
everyone can see everyone and all is happy?

Many thanks in advance.
Bahram


bahram