Yes, you'll need a free IRQ.

And whether that's hard or easy depends a lot on your computer and what other cards you currently have in it. It also depends on the bus type of your computer. PCI bus computers are typically easier to deal with on the IRQ than ISA or EISA bus computers.

If all that talk sounds scary and technical to you -- you could pay the $145 fee to have a US West technician install the hardware for you.