Inspiron 1545 Wireless Card

I have deduced that the wireless card needs replacing in my Inspiron 1545. I went through Dell's "find a product" page and it suggested two cards: 

WLAN 1510 (802.11 a/b/g/n) - Half Height - Mini-Card - Kit

Wireless : Dell WLAN 1397 (802.11 b/g) 1/2 MiniCard

But when I go to more details the Inspiron 1545 isn't listed in the "compatible with". I went on to live chat and asked if they where compatible but they couldn't help and told me to call a third party!

To confuse me even more when I check my products on an Intel Report it says I have an Intel WiFi Link 5100 fitted.

Can anyone confirm that either of the Dell cards will fit the 1545.

Another confusion is that I check the YouTube videos for fitting a new wireless card and the only video I can see is for a half height card and when I open up the back of my laptop the card is in a different position covered by a piece of black plastic and I can't figure out how to get it out. 

Any help would be appreciated.

Kind Regards

Linda