Have two desktop computers -have wireless modem- currently not set up for wireless- can it be added?

I have a wireless modem that is set up so wireless is available in our house, but would like to add wireless capability to two desktop computers one is an HP Pavilion a1240n with Intel Pentium 4 processor HT Technology, the other is a dell Dimension desktop 2400 with ntel Pentium 4 processor . If it can be added, how do I do it? Thanks

Have two desktop computers -have wireless modem- currently not set up for wireless- can it be added?trojan

Buy a wireless USB stick (cheap and easy installation).. or a wireless card..

Have two desktop computers -have wireless modem- currently not set up for wireless- can it be added?abtuvurys 2005

Add wi fi card or netgear usb port capabilities to your computers. First check to see if you have internal cards.