Merry Christmas to me......

Well gang I finally made the choice to buy a laptop. I went to Dell.com and applied for credit and I was sitting here waiting for an answer when I yelled with glee....I was approved. I am so shocked that I got credit with Dell. So I went looking for a new laptop and found one to my liking. They say it will be here on Jan 10th or so and I am so excited. Now I have a question for you computer geeks out there. We have another computer here along with mine hooked up to a cable modem and I have a wireless card coming with my laptop. Now i wonder how I can hook up to wireless when I buy a router and still keep the other computer on cable? Does anyone know if I can do this and have the wireless hooked through the cable modem? Or do I have to have Comcast come to and hook up everything for me and charge me more per month. Help me out gang I am new to wireless and need help. I will proudly be sitting at the coffee shop, once I have my new laptop!!

Here are the specs. hope I did good?

Inspiron 1520 Intel® Pentium® Dual Core T2310 (1.46GHz/533Mhz FSB/1MB cache) Operating System (Office software not included) Genuine Windows® XP Home WHXP [
System Color Jet Black BLK
Memory 1GB Shared Dual Channel DDR2 at 667MHz 1G2D
LCD Panel Glossy, widescreen 15.4 inch display (1280x800) 15XGAT
Video Card Intel Graphics Media Accelerator X3100 INTAC
Hard Drive 80GB SATA Hard Drive (5400RPM) 80GB
Network Card and Modem Integrated 10/100 Network Card and Modem INTNIC Adobe Software Adobe® Acrobat® Reader 8.1 ADOBER
Combo or DVD+RW Drive CD / DVD writer (DVD+/-RW Drive) 8XDVDRW
Sound Card High Definition Audio 2.0 IS
Wireless Networking Cards Dell Wireless 1395 802.11g Mini Card TM1395
Camera Integrated 2.0M Pixel Webcam DCAMERA
Office Productivity Software (Pre-Installed) Microsoft Works 8. DOES NOT INCLUDE MS WORD IWRK
Anti-Virus/Security Suite (Pre-installed) No Subscription (only 30-day protection)

Battery Options 56Whr Lithium Ion Battery (6 cell) 6BAT
Warranty & Service 1Yr Ltd Warranty and Mail-In Service ST111RR Dial-Up Internet Access No ISP requested NISPFSS
Digital Media Editing Software Yahoo! Music Jukebox - Music Player SEP Miscellaneous Inspiron 1520 I152001
Doms Camera Module Jet Black color w/ 2.0M pixel Camera DBLKWC
Processor Branding Intel® Pentium® Dual-Core Label ID3CNB Labels Windows XP™ VCN
DataSafe Online Backup Free 3 GB Online Backup for 1Yr